SIEBEL SYSTEMS INC
S-3, 1997-10-01
PREPACKAGED SOFTWARE
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<PAGE>
 
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON OCTOBER 1, 1997
                                                      REGISTRATION NO. 333-


                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM S-3
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                           --------------------------
                              SIEBEL SYSTEMS, INC.
             (Exact name of Registrant as specified in its charter)

DELAWARE                              7372                       94-3187233
(State or other jurisdiction   (Primary Standard Industrial   (I.R.S. Employer 
 of incorporation               Classification Code Number)    Identification
 or organization)                                                 Number)

                            1855 SOUTH GRANT STREET
                          SAN MATEO, CALIFORNIA 94402
                                 (650) 295-5000
  (Address, including zip code, and telephone number, including area code, of
                   Registrant's principal executive offices)
                           --------------------------
                                THOMAS M. SIEBEL
                      CHAIRMAN AND CHIEF EXECUTIVE OFFICER
                              SIEBEL SYSTEMS, INC.
                            1855 SOUTH GRANT STREET
                          SAN MATEO, CALIFORNIA 94402
                                 (650) 295-5000
 (Name, address, including zip code, and telephone number, including area code,
                             of agent for service)
                           --------------------------
                                   COPIES TO:
                              ERIC C. JENSEN, ESQ.
                               COOLEY GODWARD LLP
                    3000 SAND HILL ROAD, BLDG. 3, SUITE 230
                       MENLO PARK, CALIFORNIA 94025-7116
                                    843-5000
        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
     From time to time after the Registration Statement becomes effective.

     If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans please check the following
box.  [_]

     If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, please check the following box.  [X]

     If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration number of the earlier effective
registration statement for the same offering.  [_]

     If this Form is filed in a post-effective amendment filed pursuant to Rule
462(c) under the Securities Act, check the following box and list the Securities
Act registrations statement number of the earlier effective registration
statement of the same offering.  [_]

     If delivery of this prospectus is expected to be made pursuant to rule 434,
please check the following box.  [_]
                           --------------------------
                        CALCULATION OF REGISTRATION FEE
<TABLE> 
<CAPTION> 
<S>                                <C>                  <C>                   <C>                  <C> 
=================================================================================================================== 
                                                            PROPOSED              PROPOSED
TITLE OF EACH CLASS OF                  AMOUNT          MAXIMUM OFFERING      MAXIMUM AGGREGATE       AMOUNT OF
SECURITIES TO BE REGISTERED        TO BE REGISTERED     PRICE PER UNIT(1)     OFFERING PRICE(1)    REGISTRATION FEE
- -------------------------------------------------------------------------------------------------------------------
 Common Stock, $.001 par value         346,379              $40.25             $13,941,754.75          $4,225
- --------------------------------------------------------------------------------------------------------------------
</TABLE>

Estimated solely for the purpose of calculating the registration fee in
     accordance with Rule 457(c) under the Securities Act of 1933, based on the
     average of the high and low prices of the Company's Common Stock as
     reported on the Nasdaq National Market on September 24, 1997.

     THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(a),
MAY DETERMINE.
 

                                       1
<PAGE>
 
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A 
REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE 
SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY 
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT BECOMES 
EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR THE 
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE SECURITIES 
IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR 
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

PROSPECTUS       SUBJECT TO COMPLETION, DATED OCTOBER 1, 1997
                                 346,379 SHARES
               
                               SIEBEL SYSTEMS, INC.
                                  COMMON STOCK
                                        
                              ---------------------
     This Prospectus covers 346,379 shares (the "Shares") of the Common Stock,
$.001 par value ("Common Stock"), of Siebel Systems, Inc., a Delaware
corporation ("Siebel" or the "Company"), which are being offered and sold by
certain stockholders of the Company (the "Selling Stockholders").  The Selling
Stockholders, directly or through agents, broker-dealers or underwriters, may
sell the Common Stock offered hereby from time to time on terms to be determined
at the time of sale, in transactions on the Nasdaq National Market or in
privately negotiated transactions or in a combination of such methods of sale,
at fixed prices related to such prevailing prices or at negotiated prices.  The
Selling Stockholders may effect such transactions by selling Shares to or
through broker-dealers, and such broker-dealers may receive compensation in the
form of discounts, concessions or commissions from the Selling Stockholders or
the purchasers of the Shares for whom such broker-dealers may act as agents or
to whom they sell as principal or both (which compensation to a particular
broker-dealer may be in excess of customary commissions).  The Company will not
receive any proceeds from the sale of Shares by the Selling Stockholders.  See
"Selling Stockholders" and "Plan of Distribution."

     The Common Stock of the Company is quoted on the Nasdaq National Market
under the symbol "SEBL." Application has been made to list the Shares on the
Nasdaq National Market. The last reported sales price of the Common Stock on the
Nasdaq National Market on September 29, 1997 was $42.50 per share.

                              --------------------- 

  THIS OFFERING INVOLVES A HIGH DEGREE OF RISK.  SEE "RISK FACTORS" ON PAGE 6.
                                        
                              ---------------------

         THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE
           SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES
           COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION
               OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
                 ACCURACY OR ADEQUACY OF THIS PROSPECTUS.  ANY
                      REPRESENTATION TO THE CONTRARY IS A
                               CRIMINAL OFFENSE.

     No underwriting commissions or discounts will be paid by the Company in
connection with this offering.  Estimated expenses payable by the Company in
connection with this offering are estimated to be $38,000. The aggregate
proceeds to the Selling Stockholders from the Common Stock will be the purchase
price of the Common Stock sold less the aggregate agents' commissions and
underwriters' discounts, if any, and other expenses of issuance and distribution
not borne by the Company.  See "Plan of Distribution."

     The Selling Stockholders and any agents, broker-dealers or underwriters
that participate in the distribution of the Common Stock may be deemed to be
"underwriters" within the meaning of the Securities Act of 1933, as amended (the
"Act"), and any commission received by them and any profit on the resale of the
Common Stock purchased by them may be deemed to be underwriting discounts or
commissions under the Act.  The Company has agreed to indemnify the Selling
Stockholders and certain other persons against certain liabilities, including
liabilities under the Act.

                                 ____________, _______

                                       2
<PAGE>
 
                             AVAILABLE INFORMATION


     The Company is subject to the reporting requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and in accordance
therewith, files annual and quarterly reports, proxy statements and other
information with the Securities and Exchange Commission (the "Commission").
Such reports, proxy statements and other information may be inspected and copied
at the Commission's Public Reference Section, 450 Fifth Street, N.W., Room 1024,
Washington, D.C. 20549, as well as at the Commission's Regional Offices at 7
World Trade Center, 13th Floor, New York, New York 10048; and 500 West Madison
Street, Suite 1400, Chicago, Illinois 60661-2511.  Copies of such material can
be obtained at prescribed rates from the Public Reference Section of the
Commission at 450 Fifth Street, N.W., Washington, D.C. 20549.  The Commission
also  makes electronic filings publicly available on the Internet.  The
Commission's Internet address is http://www.sec.gov.  The Commission's Web site
also contains reports, proxy and information statements, and other information
regarding the Company that has been filed electronically with the Commission.
The Common Stock of the Company is quoted on the Nasdaq National Market.
Reports and other information concerning the Company may be inspected at the
National Association of Securities Dealers, Inc. at 1735 K Street, N.W.,
Washington, D.C. 20006.

                             ADDITIONAL INFORMATION

     A registration statement on Form S-3 with respect to the Common Stock
offered hereby (the "Registration Statement") has been filed with the Commission
under the Act.  This Prospectus does not contain all of the information
contained in such Registration Statement and the exhibits and schedules thereto,
certain portions of which have been omitted pursuant to the rules and
regulations of the Commission.  For further information with respect to the
Company and the Common Stock offered hereby, reference is made to the
Registration Statement and the exhibits and schedules thereto.  Statements
contained in this Prospectus regarding the contents of any contract or any other
documents are not necessarily complete and, in each instance, reference is
hereby made to the copy of such contract or document filed as an exhibit to the
Registration Statement.  The Registration Statement, including exhibits thereto,
may be inspected without charge at the Commission's principal office in
Washington, D.C., and copies of all or any part thereof may be obtained from the
Public Reference Section, Securities and Exchange Commission, Washington, D.C.,
20549, upon payment of the prescribed fees.

                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The following documents, filed with the Commission under the Exchange Act
(File No. 0-20725), are hereby incorporated by reference into this Prospectus:

     a) The Company's Annual Report on Form 10-K for the fiscal year ended
December 31, 1996, filed on or about March 7, 1997, including all material
incorporated by reference therein;

     b) The Company's Quarterly Report on Form 10-Q for the fiscal quarter
ended March 31, 1997, filed on or about May 14, 1997, including all material
incorporated by reference therein;

     c) The Company's Quarterly Report on Form 10-Q for the fiscal quarter
ended June 30, 1997, filed on or about August 12, 1997, including all material
incorporated by reference therein; and

     d) The description of the Common Stock contained in the Company's
Registration Statement on Form 8-A.

     All documents filed by the Company pursuant to Sections 13(a), 13(c), 14 or
15(d) of the Exchange Act after the date of this Prospectus and prior to the
termination of the offering shall be deemed to be incorporated by reference
herein and to be a part hereof from the date of filing of such documents.  Any
statement contained in this Prospectus or in a document incorporated or deemed
to be incorporated by reference herein shall be deemed to be modified or
superseded for purposes of this Prospectus to the extent that a statement
contained herein or in any subsequently-filed document which also is or is
deemed to be incorporated by reference herein modifies or 

                                       3.
<PAGE>
 
supersedes such statement. Any such statement so modified or superseded shall
not be deemed, except as so modified or superseded, to constitute a part of this
Prospectus.

     The Company will provide without charge to each person, including any
beneficial owner, to whom this Prospectus is delivered, upon written or oral
request of such person, a copy of any and all of the documents that have been
incorporated by reference herein (not including exhibits to such documents
unless such exhibits are specifically incorporated by reference herein or into
such documents).  Such request may be directed to: Investor Relations, Siebel
Systems, Inc., 1855 South Grant Street, San Mateo, California 94402.

     The discussions in this Prospectus and the documents incorporated by
     --------------------------------------------------------------------
reference herein contain forward-looking statements that involve risks and
- --------------------------------------------------------------------------
uncertainties.  The Company's actual results could differ materially from those
- -------------------------------------------------------------------------------
discussed herein and in such incorporated documents.  Factors that could cause
- ------------------------------------------------------------------------------
or contribute to such differences include, but are not limited to, those
- ------------------------------------------------------------------------
discussed under the heading "Risk Factors" herein, as well as those discussed in
- --------------------------------------------------------------------------------
the documents incorporated herein by reference.
- ----------------------------------------------

                                       4.
<PAGE>
 
                                  THE COMPANY

     Siebel is an industry leading provider of enterprise-class sales, marketing
and customer service information software systems.  The Company designs,
develops, markets, and supports Siebel Enterprise Applications, a leading
Internet-enabled, object oriented client/server application software product
family designed to meet the customer information system requirements of even the
largest multi-national organizations.

     The Siebel Enterprise Applications are comprised of a broad range of
advanced client/server application products designed to allow corporations to
deploy comprehensive customer information systems, product information systems,
competitive information systems, and decision support systems on a global basis.
The Company's products provide support for multiple languages and multiple
currencies with support for a number of frequently interdependent distribution
channels, including direct field sales, telesales, telemarketing, distribution,
retail and Internet-based selling.

  The Siebel Enterprise Applications are built upon a modern technology
foundation including intranet and Internet enablement, client/server, object
oriented programming, 32-bit processing, OLE 2 automation, relational database
support for Oracle, Sybase, Informix and Microsoft and system support for
Windows 95, Windows NT, and UNIX.  The Siebel Enterprise Applications are
designed to scale to meet the needs of large organizations deploying thousands
of sales, marketing and customer service professionals with very large data
storage and retrieval requirements.  The Siebel Enterprise Applications are
designed to be comprehensive in their scope of functionality and are highly
configurable, allowing for highly customized industry-specific and company-
specific system deployments.
 
  The Company's objective is to establish and maintain a global market
leadership position in the sales, marketing and customer service information
systems market.  The Company's strategy is to provide high-end enterprise
client/server sales and marketing applications in a broad range of industries,
extend its advanced technology position, achieve universally successful customer
implementations of Siebel Enterprise Applications, expand its global sales and
support capacity, and continue to leverage strategic alignment with leading
third-party technology providers, system integrators, and distributors.
 
  The Company's principal executive offices are located at 1855 S. Grant Street,
San Mateo, CA 94402. Its telephone number is (650) 295-5000. Its e-mail address
is [email protected].  The Company maintains an Internet home page.
 

                                       5.
<PAGE>
 
                                  RISK FACTORS

     In addition to the other information in this Prospectus, the following
     ----------------------------------------------------------------------
factors should be considered carefully in evaluating an investment in the Common
- --------------------------------------------------------------------------------
Stock.
- -----

     Limited Operating History.  The Company commenced operations in July 1993
     -------------------------
and shipped version 1.0 of Siebel Sales Enterprise in April 1995 and version 2.2
of Siebel Service Enterprise in December 1996.  The Company has only a limited
operating history, and its prospects must be evaluated in light of the risks and
uncertainties encountered by a company in its early stage of development.  The
new and evolving markets in which the Company operates make these risks and
uncertainties particularly pronounced.  To address these risks, the Company
must, among other things, successfully implement its sales and marketing
strategy, respond to competitive developments, attract, retain, and motivate
qualified personnel, continue to develop and upgrade its products and
technologies more rapidly than its competitors, and commercialize its products
and services incorporating these enhanced technologies.  The Company expects to
continue to devote substantial resources to its product development and sales
and customer support and, as a result, will need to generate significant
quarterly revenues to achieve and maintain profitability.  The Company's limited
operating history makes it difficult to predict accurately future operating
results.  There can be no assurance that any of the Company's business
strategies will be successful or the Company will be profitable in any future
quarter or period.

     Uncertainty of Future Operating Results; Fluctuations in Quarterly
     ------------------------------------------------------------------
Operating Results.  Prior growth rates in the Company's revenue and net income
- -----------------
should not be considered indicative of future operating results. Future
operating results will depend upon many factors, including the demand for the
Company's products, the level of product and price competition, the length of
the Company's sales cycle, the size and timing of individual license
transactions, the delay or deferral of customer implementations, the Company's
success in expanding its customer support organization, direct sales force and
indirect distribution channels, the timing of new product introductions and
product enhancements, the mix of products and services sold, levels of
international sales, activities of and acquisitions by competitors, the timing
of new hires, changes in foreign currency exchange rates and the ability of the
Company to develop and market new products and control costs.  In addition, the
decision to implement a sales and marketing information system is discretionary,
involves a significant commitment of customer resources and is subject to the
budget cycles of the Company's customers.  The Company's sales generally reflect
a relatively high amount of revenue per order.  The loss or delay of individual
orders, therefore, would have a significant impact on the revenue and quarterly
results of the Company.  The timing of license revenue is difficult to predict
because of the length and variability of the Company's sales cycle, which has
ranged to date from two to eighteen months from initial contact to the execution
of a license agreement.  The Company's operating expenses are based on
anticipated revenue trends and, because a high percentage of these expenses are
relatively fixed, a delay in the recognition of revenue from a limited number of
license transactions could cause significant variations in operating results
from quarter to quarter and could result in operating losses.  To the extent
such expenses precede, or are not subsequently followed by, increased revenues,
the Company's operating results would be materially and adversely affected.  To
date, the Company has not experienced significant seasonality of operating
results.  The Company expects that future revenues for any period may be
affected by the fiscal or quarterly budget cycles of its customers. As a result
of these and other factors, revenues for any quarter are subject to significant
variation, and the Company believes that period-to-period comparisons of its
results of operations are not necessarily meaningful and should not be relied
upon as indications of future performance. It is likely that the Company's
future quarterly operating results from time to time will not meet the
expectations of market analysis or investors, which would likely have an adverse
effect on the price of the Company's Common Stock. In addition, fluctuations in
operating results may also result in volatility in the price of the Company's
Common Stock.

     Reliance on Andersen Consulting and Other Relationships; Dependence on
     ----------------------------------------------------------------------
System Integrators.  The Company has established strategic relationships with a
- ------------------
number of organizations that it believes are important to its worldwide sales,
marketing and support activities and the implementation of its products.  The
Company believes that its relationships with such organizations provide
marketing and sales opportunities for the Company's direct sales force and
expand the distribution of its products.  These relationships also assist it in
keeping pace with the technological and marketing developments of major software
vendors, and, in certain instances, provide it with technical assistance for its
product development efforts.  In particular, the Company has established a non-

                                       6.
<PAGE>
 
exclusive strategic relationship with Andersen Consulting, a principal
stockholder of the Company.  To date, a significant portion of the revenues of
the Company were derived from customers for which Andersen Consulting had been
engaged to provide system integration services.  Any deterioration of the
Company's relationship with Andersen Consulting could have a material adverse
effect on the Company's business, financial condition and results of operations.
In addition, the Company has relationships with Itochu Corporation and Itochu
Techno-Science Corporation, among others.  The failure by the Company to
maintain its existing relationships, or to establish new relationships in the
future, could have a material adverse effect on the Company's business, results
of operations and financial condition.  The Company's customers and potential
customers frequently rely on Andersen Consulting, as well as other third-party
system integrators to develop, deploy and/or manage Siebel Enterprise
Applications.  If the Company is unable to train adequately a sufficient number
of system integrators or, if for any reason such integrators do not have or
devote the resources necessary to facilitate implementation of the Company's
products or if such integrators adopt a product or technology other than Siebel
Enterprise Applications, the Company's business, operating results and financial
condition could be materially and adversely affected.

     Dependence on the Internet.  The Siebel Enterprise Applications facilitate
     --------------------------
online communications over public and private networks.  The success of the
Company's products may depend, in part, on the Company's ability to introduce
products which are compatible with the Internet and on the broad acceptance of
the Internet and the World Wide Web as a viable commercial marketplace. It is
difficult to predict with any assurance whether the Internet will prove to be a
viable commercial marketplace or whether the demand for Internet related
products and services will increase or decrease in the future.  The increased
commercial use of the Internet could require substantial modification and
customization of the Company's products and services and the introduction of new
products and services, and there can be no assurance that the Company would be
able to effectively migrate its products to the Internet or to successfully
compete in the market for Internet-related products and services.

     The Internet may not prove to be a viable commercial marketplace because of
inadequate development of the necessary infrastructure, such as a reliable
network backbone with the necessary speed, data capability, and security, or
timely development of complementary products, such as high speed modems.  The
Internet has experienced, and is expected to continue to experience, significant
growth in the number of users and amount of traffic. There can be no assurance
that the Internet infrastructure will continue to be able to support the demands
placed on it by this continued growth.  In addition, the Internet could lose its
viability due to delays in the development or adoption of new standards and
protocols to handle increased levels of Internet activity or due to increased
governmental regulation.  Moreover, critical issues concerning the commercial
use of the Internet (including security, reliability, data corruption, cost,
ease of use, accessibility and quality of service) remain unresolved and may
negatively affect the attractiveness of commerce and communication on the
Internet.  Because global commerce and online exchange of information on the
Internet and other similar open wide area networks are new and evolving, there
can be no assurance that the Internet will prove to be a viable commercial
marketplace.  If critical issues concerning the commercial use of the Internet
are not favorably resolved, if the necessary infrastructure and complementary
products are not developed, or if the Internet does not become a viable
commercial marketplace, the Company's business, operating results and financial
condition could be materially and adversely affected.

     Risk Associated with Emerging Client/Server and Customer Information
     --------------------------------------------------------------------
Markets.  The client/server application software market is a relatively new
- -------
market and is intensely competitive, highly fragmented and subject to rapid
change.  The Company markets its products only to customers who have migrated or
are in the process of migrating their enterprise computing systems to
client/server computing environments.  The Company does not market its products
to customers exclusively using legacy computer systems.  The Company's future
financial performance will depend in large part on continued growth in the
number of organizations successfully adopting client/server computing
environments.  There can be no assurance that the client/server market will
maintain its current level of growth or continue to grow at all. If the
client/server market fails to grow or grows more slowly than the Company
currently anticipates, the Company's business, operating results and financial
condition could be materially and adversely affected.  Similarly, the market for
customer information software is intensely competitive, highly fragmented and
subject to rapid change.  The Company's future financial performance will depend
primarily on growth in the number of customer information applications developed
for use in client/server environments.  There can be no assurance that the
market for customer information software will continue to grow. If the customer
information software market fails to grow or grows more slowly than the Company
currently 

                                       7.
<PAGE>
 
anticipates, the Company's business, operating results and financial
condition would be materially and adversely affected.

     Limited Deployment.  Many of the Company's customers are in the pilot phase
     ------------------
of implementing the Company's software.  There can be no assurance that
enterprise-wide deployments by such customers will be successful.  The Company's
customers frequently contemplate the deployment of its products commercially to
large numbers of sales, marketing and customer service personnel, many of whom
have not previously used application software systems, and there can be no
assurance of such end-users' acceptance of the product.  The Company's products
are being deployed on a variety of computer hardware platforms and used in
connection with a number of third-party software applications and programming
tools.  Such deployment presents significant technical challenges, particularly
as large numbers of customer personnel attempt to use the Company's product
concurrently.  If any of the Company's customers are not able to customize and
deploy Siebel Enterprise Applications successfully and on a timely basis to the
number of anticipated users, the Company's reputation could be significantly
damaged, which could have a material adverse effect on the Company's business,
operating results and financial condition.  In addition to revenues from new
customers, the Company expects that a significant percentage of any future
revenues will be derived from sales to existing customers. However, such
customers are not contractually committed in all cases to purchase additional
licenses.  If existing customers have difficulty further deploying Siebel
Enterprise Applications or for any other reason are not satisfied with Siebel
Enterprise Applications, the Company's business, operating results and financial
condition could be materially and adversely affected

     Reliance on Single Product Family.  A substantial majority of the Company's
     ---------------------------------
revenues to date have been attributable to sales of Siebel Sales Enterprise.
The remaining revenues were primarily attributable to maintenance and training
services related to such product family.  The Company currently expects Siebel
Sales Enterprise and related maintenance and training services to continue to
account for a substantial majority of the Company's future revenues.  As a
result, factors adversely affecting the pricing of or demand for Siebel Sales
Enterprise, such as competition or technological change, could have a material
adverse effect on the Company's business, operating results and financial
condition.  The Company's future financial performance will depend, in
significant part, on the successful deployment of current versions of Siebel
Sales Enterprise and the development, introduction and customer acceptance of
new and enhanced versions of Siebel Sales Enterprise and other products.  There
can be no assurance that the Company will be successful in marketing Siebel
Sales Enterprise product or other products. In the event that the Company
continues to derive a substantial percentage of its revenues from perpetual
license fees for Siebel Sales Enterprise and is successful in licensing such
product to a very large portion of the customers in the markets targeted by the
Company, the Company's business, financial condition and results of operations
could be materially and adversely affected unless the Company is able to
establish additional sources of revenue.

     Lengthy Sales and Implementation Cycles.  The license of the Company's
     ---------------------------------------
software products is often an enterprise-wide decision by prospective customers
and generally requires the Company to provide a significant level of education
to prospective customers regarding the use and benefits of the Company's
products.  In addition, the implementation of the Company's products involves a
significant commitment of resources by prospective customers and is commonly
associated with substantial reengineering efforts which may be performed by the
customer or third-party system integrators.  The cost to the customer of the
Company's product is typically only a portion of the related hardware, software,
development, training and integration costs of implementing a large-scale sales
and marketing information system.  For these and other reasons, the period
between initial contact and the implementation of the Company's products is
often lengthy (ranging to date from between two and twenty-four months) and is
subject to a number of significant delays over which the Company has little or
no control.  The Company's implementation cycle could be lengthened by increases
in the size and complexity of its license transactions and by delays in its
customers' implementation of client/server computing environments.  Delay in the
sale or implementation of a limited number of license transactions could have a
material adverse effect on the Company's business and operations and cause the
Company's operating results to vary significantly from quarter to quarter.
Therefore, the Company believes that its quarterly operating results are likely
to vary significantly in the future.

     Risks Associated with Expanding Distribution.  To date, the Company has
     --------------------------------------------
sold its products primarily through its direct sales force and has supported its
customers with its technical and customer support staff.  The 

                                       8.
<PAGE>
 
Company's ability to achieve significant revenue growth in the future will
depend in large part on its success in recruiting and training sufficient direct
sales, technical and customer support personnel and establishing and maintaining
relationships with its strategic partners. Although the Company is currently
investing, and plans to continue to invest, significant resources to expand its
direct sales force and its technical and customer support staff and to develop
distribution relationships with strategic partners, the Company has at times
experienced and continues to experience difficulty in recruiting qualified
personnel and in establishing necessary third-party relationships. There can be
no assurance that the Company will be able to expand successfully its direct
sales force or other distribution channels or that any such expansion will
result in an increase in revenues. The Company believes the complexity of its
products and the large-scale deployment anticipated by its customers will
require a number of highly trained customer support personnel. There can be no
assurance that the Company will successfully expand its technical and customer
support staff to meet customer demands. Any failure by the Company to expand its
direct sales force or other distribution channels, or to expand its technical
and customer support staff, could materially and adversely affect the Company's
business, operating results and financial condition.

     Dependence on Large License Fee Contracts and Customer Concentration.  A
     --------------------------------------------------------------------
relatively small number of customers have accounted for a significant percentage
of the Company's revenues.  To date, sales to the Company's 10 largest customers
in each fiscal year have accounted for a majority of the Company's revenues
during such period.  The Company expects that sales of its products to a limited
number of customers will continue to account for a significant percentage of
revenue for the foreseeable future.  The loss of any major customer or any
reduction or delay in orders by any such customer, or the failure of the Company
to market successfully its products to new customers could have a material
adverse effect on the Company's business, financial condition and results of
operations.

     Risk Associated with New Versions and New Products; Rapid Technological
     -----------------------------------------------------------------------
Change.  The software market in which the Company competes is characterized by
- ------
rapid technological change, frequent introductions of new products, changes in
customer demands and evolving industry standards.  The introduction of products
embodying new technologies and the emergence of new industry standards can
render existing products obsolete and unmarketable.  For example, the Company's
customers have adopted a wide variety of hardware, software, database and
networking platforms, and as a result, to gain broad market acceptance, the
Company must support Siebel Sales Enterprise and the Company's other products on
a variety of such platforms.  The Company's future success will depend upon its
ability to address the increasingly sophisticated needs of its customers by
supporting existing and emerging hardware, software, database and networking
platforms and by developing and introducing enhancements to Siebel Enterprise
Applications and new products on a timely basis that keep pace with
technological developments, evolving industry standards and changing customer
requirements.  The Company currently ships production versions of its software
running on MS Windows 3.1, MS Windows 95 and Windows NT clients, as well as on
NT application servers, and NT, Sun and HP UNIX database server platforms.  The
Company plans, in the future, to support subsequent versions of Microsoft's
Windows client operating system, as well as UNIX application servers and Digital
Alpha and additional UNIX database server platforms.  There can be no assurance
that the Company will be successful in releasing Siebel Enterprise Applications
for use on such platforms or in developing and marketing enhancements that
respond to technological developments, evolving industry standards or changing
customer requirements, or that the Company will not experience difficulties that
could delay or prevent the successful development, introduction and sale of such
enhancements or that such enhancements will adequately meet the requirements of
the marketplace and achieve any significant degree of market acceptance.  If
release dates of any future Siebel Enterprise Applications enhancements or new
products are delayed or if these products or enhancements fail to achieve market
acceptance when released, the Company's business, operating results and
financial condition could be materially and adversely affected.  In addition,
the introduction or announcement of new product offerings or enhancements by the
Company or the Company's competitors or major hardware, systems or software
vendors may cause customers to defer or forgo purchases of the Company's
products, which could have a material adverse effect on the Company's business,
financial condition and results of operations.

     Competition.  The market for the Company's products is intensely
     -----------
competitive, subject to rapid change and significantly affected by new product
introductions and other market activities of industry participants.  The
Company's products are targeted at the emerging market for customer information
systems, and the Company 

                                       9.
<PAGE>
 
faces competition primarily from customer's internal information technology
departments and systems integrators, as well as from other application software
providers that offer a variety of products and services to address this market.
Many of the Company's customers and potential customers have in the past
attempted to develop customer information systems, in-house either alone or with
the help of systems integrators and there can be no assurance that the Company
will be able to compete successfully against such internal development efforts.

     The Company relies on a number of systems consulting and systems
integration firms, particularly Andersen Consulting, for implementation and
other customer support services, as well as recommendations of its products
during the evaluation stage of the purchase process.  Although the Company seeks
to maintain close relationships with these service providers, many of them have
similar, and often more established, relationships with the Company's
competitors.  If the Company is unable to develop and retain effective, long-
term relationships with these third parties, the Company's competitive position
could be materially and adversely affected.  Further, there can be no assurance
that these third parties, many of which have significantly greater resources
than the Company, will not market software products in competition with the
Company in the future or will not otherwise reduce or discontinue their
relationships with or support of the Company and its products.

     A large number of personal, departmental and other products exist in the
customer information systems market.  Some of the Company's current and
potential competitors and their products include Symantec (ACT!), Borealis
Corporation (Arsenal), Brock International (Take Control Sales), Early Cloud &
Co. (CallFlow), Clarify, Inc. (ClearSales, ClearSupport), IMA (EDGE),
Marketrieve Company (Marketrieve PLUS), Oracle Corporation (Oracle Sales and
Marketing), Pivotal Software, Inc. (Relationship), SalesBook Systems
(SalesBook), SalesKit Software Corporation (SalesKit), Scopus Technology, Inc.
(Voyager, SalesTEAM, ServiceTEAM), Aurum Software, Inc. (SalesTrak) (recently
acquired by Baan Company N.V.), Saratoga Systems (SPS for Windows) and The
Vantive Corporation (Vantive Enterprise).  Some of these competitors have longer
operating histories, significantly greater financial, technical, marketing and
other resources, significantly greater name recognition and a larger installed
base of customers than the Company.  In addition, many competitors have well-
established relationships with current and potential customers of the Company.
As a result, these competitors may be able to respond more quickly to new or
emerging technologies and changes in customer requirements, or to devote greater
resources to the development, promotion and sale of their products, than can the
Company.

     It is also possible that new competitors or alliances among competitors may
emerge and rapidly acquire significant market share.  The Company also expects
that competition will increase as a result of consolidation in the software
industry.  Increased competition may result in price reductions, reduced gross
margins and loss of market share, any of which could materially adversely affect
the Company's business, operating results and financial condition.  There can be
no assurance that the Company will be able to compete successfully against
current and future competitors or that competitive pressures faced by the
Company will not materially and adversely affect its business, operating results
and financial condition.

     Reliance on Third-Party Vendors.   The Company incorporates into its
     -------------------------------
products certain software licensed to it by third-party software developers.
Although the Company believes there are other sources for these products, any
significant interruption in the supply of such products could have a material
adverse impact on the Company's sales unless and until the Company can replace
the functionality provided by these products.  Because the Company's products
incorporate software developed and maintained by third parties, the Company is
to a certain extent dependent upon such third parties' abilities to enhance
their current products, to develop new products on a timely and cost-effective
basis and to respond to emerging industry standards and other technological
changes.  There can be no assurance that the Company would be able to replace
the functionality provided by the third-party software currently offered in
conjunction with the Company's products in the event that such software becomes
obsolete or incompatible with future versions of the Company's products or is
otherwise not adequately maintained or updated.  The absence of or any
significant delay in the replacement of that functionality could have a material
adverse effect on the Company's sales.

     Risk of Product Defects.  Software products as internally complex as those
     -----------------------
offered by the Company frequently contain errors or failures, especially when
first introduced or when new versions are released.  Although the Company
conducts extensive product testing during product development, the Company has
been forced to delay commercial release of products until the correction of
software problems and, in some cases, has provided 

                                      10.
<PAGE>
 
product enhancements to correct errors in released products. The Company could,
in the future, lose revenues as a result of software errors or defects. The
Company's products are intended for use in sales applications that may be
critical to a customer's business. As a result, the Company expects that its
customers and potential customers have a greater sensitivity to product defects
than the market for software products generally. There can be no assurance that,
despite testing by the Company and by current and potential customers, errors
will not be found in new products or releases after commencement of commercial
shipments, resulting in loss of revenue or delay in market acceptance, diversion
of development resources, damage to the Company's reputation, or increased
service and warranty costs, any of which could have a material adverse effect
upon the Company's business, operating results and financial condition.

     Management of Growth; Dependence upon Key Personnel.  In the event that the
     ---------------------------------------------------
significant growth of the Company's revenues continues, such growth may place a
significant strain upon the Company's management systems and resources.  The
Company's ability to compete effectively and to manage future growth, if any,
will require the Company to continue to improve its financial and management
controls, reporting systems and procedures on a timely basis and expand, train
and manage its employee work force.  There can be no assurance that the Company
will be able to do so successfully.  The Company's failure to do so could have a
material adverse effect upon the Company's business, operating results and
financial condition.  The Company's future performance depends in significant
part upon the continued service of its key technical, sales and senior
management personnel, particularly Thomas M. Siebel, the Company's Chairman and
Chief Executive Officer, none of whom has entered into an employment agreement
with the Company.  The loss of the services of one or more of the Company's
executive officers could have a material adverse effect on the Company's
business, operating results and financial condition.  The Company's future
success also depends on its continuing ability to attract and retain highly
qualified technical, customer support, sales and managerial personnel.
Competition for such personnel is intense, and there can be no assurance that
the Company will be able to retain its key technical, sales and managerial
employees or that it can attract, assimilate or retain other highly qualified
technical, sales and managerial personnel in the future.

     Proprietary Rights; Risks of Infringement.  The Company relies primarily on
     -----------------------------------------
a combination of patent, copyright, trade secret and trademark laws,
confidentiality procedures and contractual provisions to protect its proprietary
rights.  The Company also believes that factors such as the technological and
creative skills of its personnel, new product developments, frequent product
enhancements, name recognition and reliable product maintenance are essential to
establishing and maintaining a technology leadership position.  The Company
seeks to protect its software, documentation and other written materials under
patent, trade secret and copyright laws, which afford only limited protection.
The Company currently has a number of patent applications pending in the United
States.  There can be no assurance that any patents issued to the Company will
not be invalidated, circumvented or challenged, that the rights granted
thereunder will provide competitive advantages to the Company or that any of the
Company's pending or future patent applications, whether or not being currently
challenged by applicable governmental patent examiners, will be issued with the
scope of the claims sought by the Company, if at all.  Furthermore, there can be
no assurance that others will not develop technologies that are similar or
superior to the Company's technology or design around any patents issued to the
Company.  Despite the Company's efforts to protect its proprietary rights,
unauthorized parties may attempt to copy aspects of the Company's products or to
obtain and use information that the Company regards as proprietary.  Policing
unauthorized use of the Company's products is difficult, and while the Company
is unable to determine the extent to which piracy of its software products
exists, software piracy can be expected to be a persistent problem.  In
addition, the laws of some foreign countries do not protect the Company's
proprietary rights as fully as do the laws of the United States.  There can be
no assurance that the Company's means of protecting its proprietary rights in
the United States or abroad will be adequate or that the Company's competitors
will not independently develop similar technology.  The Company has entered into
agreements with substantially all of its customers which require the Company to
place Siebel Enterprise Applications source code into escrow.  Such agreements
generally provide that such parties will have a limited, non-exclusive right to
use such code in the event that there is a bankruptcy proceeding by or against
the Company, if the Company ceases to do business or if the Company fails to
meet its support obligations. Entering into such agreements may increase the
likelihood of misappropriation by third parties.

                                      11.
<PAGE>
 
     The Company is not aware that it is infringing any proprietary rights of
third parties.  There can be no assurance, however, that third parties will not
claim infringement by the Company of their intellectual property rights.  The
Company expects that software product developers will increasingly be subject to
infringement claims as the number of products and competitors in the Company's
industry segment grows and the functionality of products in different industry
segments overlaps.  Furthermore, there can be no assurance that former employers
of the Company's present and future employees will not assert claims that such
employees have improperly disclosed confidential or proprietary information to
the Company.  Any such claims, with or without merit, could be time consuming to
defend, result in costly litigation, divert management's attention and
resources, cause product shipment delays or require the Company to pay money
damages or enter into royalty or licensing agreements.  Such royalty or
licensing agreements, if required, may not be available on terms acceptable to
the Company, if at all.  In the event of a successful claim of product
infringement against the Company and failure or inability of the Company to
license the infringed or similar technology, the Company's business, operating
results and financial condition would be materially and adversely affected.

     The Company relies upon certain software that it licenses from third
parties, including software that is integrated with the Company's internally
developed software and used in Siebel Sales Enterprise and the Company's other
products to perform key functions.  There can be no assurance that these third-
party software licenses will continue to be available to the Company on
commercially reasonable terms.  The loss of, or inability to maintain, any such
software licenses could result in shipment delays or reductions until equivalent
software could be developed, identified, licensed and integrated which would
materially adversely affect the Company's business, operating results and
financial condition.

     International Operations.  The Company's sales are primarily to large
     ------------------------
multi-national companies.  To service the needs of such companies, both
domestically and internationally, the Company must provide worldwide product
support services.  As a result, the Company has expanded and intends to continue
to expand its international operations and enter additional international
markets, which will require significant management attention and financial
resources and could adversely affect the Company's operating margins and
earnings, if any.  Since international sales commenced in the fourth quarter of
1995, revenues from international sales have accounted for a significant portion
of the Company's total revenues.  The Company believes that in order to increase
sales opportunities and profitability it will be required to expand its
international operations.  The Company has committed and continues to commit
significant management time and financial resources to developing direct and
indirect international sales and support channels.  There can be no assurance,
however, that the Company will be able to maintain or increase international
market demand for Siebel Enterprise Applications.  To the extent that the
Company is unable to do so in a timely manner, the Company's international sales
will be limited, and the Company's business, operating results and financial
condition could be materially and adversely affected.

     The growth in the Company's revenues from international sales is expected
to continue to subject a portion of the Company's revenues to the risks
associated with international sales, including foreign currency fluctuations,
economic or political instability, shipping delays and various trade
restrictions, any of which could have a significant impact on the Company's
ability to deliver products on a competitive and timely basis.  Future
imposition of, or significant increases in the level of, customs duties, export
quotas or other trade restrictions, could have an adverse effect on the
Company's business, financial condition and results of operations.  As the
Company continues to develop an international sales force, it expects to be more
directly subject to foreign currency fluctuations.  To the extent such direct
sales are denominated in foreign currency, any such fluctuation may adversely
affect the Company's business, financial condition and results of operations.
Finally, the laws of certain foreign countries do not protect the Company's
intellectual property rights to the same extent as do the laws of the United
States.

     Product Liability.  The Company's license agreements with its customers
     -----------------
typically contain provisions designed to limit the Company's exposure to
potential product liability claims.  It is possible, however, that the
limitation of liability provisions contained in the Company's license agreements
may not be effective under the laws of certain jurisdictions.  Although the
Company has not experienced any product liability claims to date, the sale and
support of products by the Company may entail the risk of such claims, and there
can be no assurance that the Company will not be subject to such claims in the
future.  A successful product liability claim brought against 

                                      12.
<PAGE>
 
the Company could have a material adverse effect upon the Company's business,
operating results and financial condition.

     Control by Existing Stockholders.  The Company's current officers,
     --------------------------------
directors and affiliated entities together beneficially owned approximately
54.5% of the outstanding shares of Common Stock as of December 31, 1996.  In
particular, Thomas M. Siebel, the Company's Chairman and Chief Executive
Officer, owned approximately 38.2% of the outstanding shares of Common Stock as
of December 31, 1996.  As a result, these stockholders will be able to exercise
control over matters requiring stockholder approval, including the election of
directors, and the approval of mergers, consolidations and sales of all or
substantially all of the assets of the Company.  This may prevent or discourage
tender offers for the Company's Common Stock unless the terms are approved by
such stockholders.

     Possible Volatility of Stock Price.  The Company's stock price has
     ----------------------------------
fluctuated substantially since its initial public offering in June 1996.  The
trading price of the Company's Common Stock is subject to significant
fluctuations in response to variations in quarterly operating results, the gain
or loss of significant orders, changes in earning estimates by analysts,
announcements of technological innovations or new products by the Company or its
competitors, general conditions in the software and computer industries and
other events or factors.  In addition, the stock market in general has
experienced extreme price and volume fluctuations which have affected the market
price for many companies in industries similar or related to that of the Company
and which have been unrelated to the operating performance of these companies.
These market fluctuations have adversely affected and may continue to adversely
affect the market price of the Company's Common Stock.

     Effect of Certain Charter Provisions; Antitakeover Effects of Certificate
     -------------------------------------------------------------------------
of Incorporation, Bylaws and Delaware Law.  The Company's Board of Directors has
- -----------------------------------------
the authority to issue up to 2,000,000 shares of Preferred Stock and to
determine the price, rights, preferences, privileges and restrictions, including
voting rights, of those shares without any further vote or action by the
stockholders.  The Preferred Stock could be issued with voting, liquidation,
dividend and other rights superior to those of the Common Stock.  The rights of
the holders of Common Stock will be subject to, and may be adversely affected
by, the rights of the holders of any Preferred Stock that may be issued in the
future.  The issuance of Preferred Stock, while providing desirable flexibility
in connection with possible acquisitions and other corporate purposes, could
have the effect of making it more difficult for a third party to acquire a
majority of the outstanding voting stock of the Company.  Pursuant to the
Company's Certificate of Incorporation, the Company has instituted a classified
Board of Directors.  This and certain other provisions of the Company's
Certificate of Incorporation and certain provisions of the Company's Bylaws and
of Delaware law, could delay or make more difficult a merger, tender offer or
proxy contest involving the Company.

                                USE OF PROCEEDS

     The Company will not receive any proceeds from the sale of the Shares by
the Selling Stockholders.

                                DIVIDEND POLICY

     The Company has never paid any cash dividends on its capital stock.  The
Company currently intends to retain any future earnings to finance the growth
and development of its business and therefore does not anticipate paying any
cash dividends in the foreseeable future.

                                      13.
<PAGE>
 
                              SELLING STOCKHOLDERS

     The following table sets forth the names of the Selling Stockholders, the
number of shares of Common Stock owned beneficially by the Selling Stockholders
as of October 1, 1997 and the number of Shares which may be offered pursuant to
this Prospectus.  The Selling Stockholders may offer all, some or none of their 
Shares.


        NAME             SHARES BENEFICIALLY      SHARES    SHARES BENEFICIALLY
        ----                OWNED PRIOR TO         BEING        OWNED AFTER
                             OFFERING(2)          OFFERED     OFFERING(1)(2)
                               --------           -------        -----------
                            NUMBER PERCENT(3)                 NUMBER  PERCENT(3)
                            ------ ----------                 ------  ---------

Kenneth C. Jeffers(4)      143,175      *         143,175        -        -
Michael T. Howard(5).       77,099      *          77,099        -        -
Salem Partners,             47,473      *          47,473        -        -
 L.P.(5).............
Gregory L. Craig.....       39,363      *          39,363        -        -
Windhorse                    9,494      *           9,494        -        -
 Corporation
Lonecone, Ltd........        7,596      *           7,596        -        -
Stuart Hamill........        2,659      *           2,659        -        -
Sybil S. Craig.......        2,279      *           2,279        -        -
Jurgen Leschner(6)...        2,847      *           2,278      569        *
Albert B. Craig              1,899      *           1,899        -        -
 III.................
B.G. Staffan                 1,899      *           1,899        -        -
 Lundback............
Alexander Henkles,           1,899      *           1,899        -        -
 Jr..................
Virginia Egger.......        1,899      *           1,899        -        -
Barry Keesan.........        1,899      *           1,899        -        -
Shaun T. Logan.......        1,709      *           1,709        -        -
Rodd M. Halstead.....        1,519      *           1,519        -        -
Brian Rowles.........        1,044      *           1,044        -        -
Wendy A. Hassan......          545      *             545        -        -
Chartiers West,                379      *             379        -        -
 Inc.................
Thaddeus W. Batt.....          272      *             272        -        -

- -------------------------
*    Less than one percent
(1)  Assumes the sale of all Shares offered hereby.
(2)  Excludes an aggregate of 81,076 shares of Common Stock which will be
     issued to the Selling Stockholders pursuant to the Merger Agreement (as
     defined below) upon satisfaction of certain conditions.
(3)  Applicable percentage of ownership is based on 34,520,071 shares of Common
     Stock outstanding (net of treasury shares) as of September 24, 1997 plus
     346,379 shares of Common Stock issued to the Selling Stockholders on
     October 1, 1997.
(4)  Includes 71,588 Shares subject to the terms of a Stock Vesting Agreement
     dated as of October 1, 1997 by and between the Company and such Selling
     Stockholder. Pursuant to such agreement, such Shares vest under certain
     circumstances and may not be sold until vested.
(5)  Includes 38,550 Shares subject to the terms of a Stock Vesting Agreement
     dated as of October 1, 1997 by and between the Company and such Selling
     Stockholder. Pursuant to such agreement, such Shares vest under certain
     circumstances and may not be sold until vested.
(6)  Includes 569 shares of Common Stock subject to exercise under a stock 
     option within 60 days of October 1, 1997.

                                      14.
<PAGE>
 
Each of the Selling Stockholders held shares of stock of InterActive WorkPlace,
Inc. ("InterActive"), either directly or indirectly as a limited or general
partner of a stockholder. Ms. Hassan and Messrs. Leschner, Logan, Halstead,
Rowles and Batt were employees of InterActive and Messrs. Jeffers, Howard and
Craig were executive officers of InterActive. On October 1, 1997 InterActive
merged into INTW Acquisition Corp. ("INTW"), a wholly-owned subsidiary of the
Company and became a wholly-owned subsidiary of the Company, pursuant to an
Agreement and Plan of Merger and Reorganization between the Company, INTW,
InterActive and certain stockholders of InterActive dated as of September 13,
1997 (the "Merger Agreement"). Pursuant to the Merger Agreement, in exchange for
their shares in InterActive, each of the Selling Stockholders or the limited
partnership of which certain of the Selling Stockholders were general or limited
partners, received the Shares set forth in the table above. Each of the
individual Selling Stockholders that were employees or executive officers of
InterActive, other than Mr. Craig, have accepted employment with the Company.


                              PLAN OF DISTRIBUTION

     The Company is registering the Shares offered by the Selling Stockholders
hereunder pursuant to covenants under the Merger Agreement and contractual
registration rights contained in a Registration Rights Agreement by and among
the Company and the Selling Stockholders, dated October 1, 1997 (the
"Registration Rights Agreement"). Sales may be made on the Nasdaq National
Market or in private transactions or in a combination of such methods of sale,
at fixed prices that may be changed, at market prices prevailing at the time of
sale, at prices related to such prevailing market prices or at negotiated
prices. The Selling Stockholders and any persons who participate in the
distribution of the Shares offered hereby may be deemed to be underwriters
within the meaning of the Act, and any discounts, commissions or concessions
received by them and any provided pursuant to the sale of the Shares by them
might be deemed to be underwriting discounts and commissions under the Act. The
Selling Stockholders will be subject to the applicable provisions of the
Exchange Act, and the rules and regulations thereunder, including without
limitation, Rules 10b-2, 10b-6 and 10b-7, which provisions may limit the timing
of purchases and sales of any of the Common Stock by the Selling Stockholders.

     In order to comply with the securities laws of certain states, if
applicable, the Shares may be sold in such jurisdictions only through registered
or licensed brokers or dealers.  In addition, in certain states the Shares may
not be sold unless it has been registered or qualified for sale or an exemption
from registration or qualification requirements is available and is complied
with.

     The Company has agreed in the Merger Agreement and the Registration Rights
Agreement to register the shares of Common Stock received by the Selling
Stockholders pursuant to the Merger Agreement under applicable Federal and state
securities laws under certain circumstances and at certain times. Pursuant to
the Merger Agreement, the Company has filed a registration statement related to
the Shares offered hereby and has agreed pursuant to the Registration Rights
Agreement to keep such registration statement effective until the earliest of
(i) October 1, 1998 (the first anniversary of the closing of the InterActive
acquisition), (ii) the satisfaction of all requirements to sell all such Shares
under Rule 144 during any ninety (90) day period, or (iii) the sale of all the
securities registered thereunder. The Company will pay substantially all of the
expenses incident to the offering and sale of the Common Stock to the public,
other than commissions, concessions and discounts of underwriters, dealers or
agents. Such expenses (excluding such commissions and discounts) are estimated
to be $38,000. The Registration Rights Agreement provides for cross-
indemnification of the Selling Stockholders and the Company to the extent
permitted by law for losses, claims, damages, liabilities and expenses arising,
under certain circumstances, out of any registration of the Common Stock.

                                      15.
<PAGE>
 
                                 LEGAL MATTERS

     The validity of the issuance of the Common Stock offered hereby will be
passed upon for the Company by Cooley Godward LLP, Menlo Park, California
("Cooley Godward"). As of the date of this Prospectus, certain members and
associates of Cooley Godward own an aggregate of 39,584 shares of Common Stock.
In addition, James C. Gaither, a director and the Secretary of the Company and a
partner of Cooley Godward, owns 80,282 shares of Common Stock and has options to
purchase 74,000 shares of Common Stock. Eric C. Jensen, a partner of Cooley
Godward, is an Assistant Secretary of the Company.

                                    EXPERTS

     The financial statements and schedule of Siebel Systems, Inc. as of
December 31, 1995 and 1996 and for each of the years in the three-year period
ended December 31, 1996, have been incorporated by reference in this
Prospectus in reliance upon the report of KPMG Peat Marwick LLP, independent
certified public accountants, incorporated by reference herein, upon the
authority of said firm as experts in accounting and auditing.

                                      16.
<PAGE>
 
=======================================


 NO DEALER, SALESMAN OR OTHER PERSON     
 HAS BEEN AUTHORIZED TO GIVE ANY                                                
 INFORMATION OR TO MAKE ANY                                                     
 REPRESENTATIONS OTHER THAN THOSE                                               
 CONTAINED IN THIS PROSPECTUS AND, IF                                           
 GIVEN OR MADE, SUCH OTHER INFORMATION                                          
 AND REPRESENTATIONS MUST NOT BE                                                
 RELIED UPON AS HAVING BEEN AUTHORIZED                                          
 BY THE COMPANY.  THIS PROSPECTUS DOES                                          
 NOT CONSTITUTE AN OFFER OR                                                     
 SOLICITATION BY ANYONE IN ANY STATE                                            
 IN WHICH SUCH OFFER OR SOLICITATION                                            
 IS NOT AUTHORIZED, OR IN WHICH THE                                             
 PERSON MAKING SUCH OFFER OR                                                    
 SOLICITATION IS NOT QUALIFIED TO DO                                            
 SO, OR TO ANY PERSON TO WHOM IT IS                                             
 UNLAWFUL TO MAKE SUCH OFFER OR                                                 
 SOLICITATION.  THE DELIVERY OF THIS                                            
 PROSPECTUS AT ANY TIME DOES NOT IMPLY                                          
 THAT THE INFORMATION HEREIN IS                                                 
 CORRECT AS OF ANY TIME SUBSEQUENT TO                                           
 THE DATE HEREOF.                                                               
                                                                                
                                                                                
           -----------------
                                                                                
           TABLE OF CONTENTS                                                    
                                                                                
                                   PAGE                                         
                                   ----                                         
                                                                                
 Available Information...........    3
 Additional Information..........    3
 Incorporation of Certain            
   Documents by Reference........    3
 The Company.....................    5
 Risk Factors....................    6
 Use of Proceeds.................   13
 Dividend Policy.................   13
 Selling Stockholders............   14
 Plan of Distribution............   15
 Legal Matters...................   16
 Experts.........................   16
                                                                                
            -----------------
 
 ======================================= 
 ======================================= 


               346,379 SHARES                                                  


            SIEBEL SYSTEMS, INC.                                               



                COMMON STOCK                                                   
                                                                               
                ------------
                 PROSPECTUS                                                    
                ------------
                                                                               
                                                                               
                                                                               
                                                                               
            ____________, _____                                                 
 
 
  ======================================= 
 
 

                                      17.
<PAGE>
 
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

     The following table sets forth all expenses, other than the underwriting
discounts and commissions, payable by the Registrant in connection with the sale
of the Common Stock being registered.  All the amounts shown are estimates
except for the registration fee.

     Registration fee....................                 $ 4,225
     Legal fees and expenses.............                  30,000
     Accounting fees and expenses........                   2,000
     Miscellaneous.......................                   1,775
                                                                      
     TOTAL                                                $38,000 

ITEM 15.  INDEMNIFICATION OF OFFICERS AND DIRECTORS.
 
  Under Section 145 of the Delaware General Corporation Law, the Registrant has
broad powers to indemnify its directors and officers against liabilities they
may incur in such capacities, including liabilities under the Securities Act of
1933, as amended (the "Securities Act").
 
  The Registrant's Certificate of Incorporation, as amended provides for the
elimination of liability for monetary damages for breach of the directors'
fiduciary duty of care to the Registrant and its stockholders.  These provisions
do not eliminate the directors' duty of care and, in appropriate circumstances,
equitable remedies such an injunctive or other forms of non-monetary relief will
remain available under Delaware law. In addition, each director will continue to
be subject to liability for breach of the director's duty of loyalty to the
Registrant, for acts or omissions not in good faith or involving intentional
misconduct, for knowing violations of law, for any transaction from which the
director derived an improper personal benefit, and for payment of dividends or
approval of stock repurchases or redemptions that are unlawful under Delaware
law.  The provision does not affect a director's responsibilities under any
other laws, such as the federal securities laws or state or federal
environmental laws.
 
  The Registrant has entered into agreements with its directors and executive
officers that require the Registrant to indemnify such persons against expenses,
judgments, fines, settlements and other amounts actually and reasonably incurred
(including expenses of a derivative action) in connection with any proceeding,
whether actual or threatened, to which any such person may be made a party by
reason of the fact that such person is or was a director or officer of the
Registrant or any of its affiliated enterprises, provided such person acted in
good faith and in a manner such person reasonably believed to be in or not
opposed to the best interests of the Registrant and, with respect to any
criminal proceeding, had no reasonable cause to believe his or her conduct was
unlawful.  The indemnification agreements also set forth certain procedures that
will apply in the event of a claim for indemnification thereunder.
 
ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

     (a)  Exhibits.

EXHIBIT
NUMBER      DESCRIPTION OF DOCUMENT
- -------     -----------------------
    3.3     Restated Certificate of Incorporation of the Registrant. (3)
    3.4     Bylaws of the Registrant. (1)
    4.1     Reference is made to Exhibits 3.3 and 3.4. (1)
    4.2     Specimen Stock Certificate. (1)

                                      II-1
<PAGE>
 
EXHIBIT
NUMBER      DESCRIPTION OF DOCUMENT
- -------     -----------------------

    4.3     Restated Investor Rights Agreement, dated December 1,
            1995, between the Registrant and certain investors, as
            amended April 30, 1996 and June 14, 1996. (1)
    4.4     Form of Registration Rights Agreement, between the Registrant and
            certain stockholders. (5)
    5.1     Opinion of Cooley Godward LLP. (5)
   10.1     Registrant's 1996 Equity Incentive Plan, as amended. (3)
   10.2     Registrant's Employee Stock Purchase Plan, as amended. (3)
   10.3     Form of Indemnity Agreement entered into between the
            Registrant and its officers and directors. (1)
   10.4     Registrant's Deferred Compensation Plan, dated January
            10, 1997. (4)
   10.6     Master Alliance Agreement, dated March 17, 1995, between
            the Registrant and Andersen Consulting LLP. (1)(2)
   10.9     Assignment Agreement, dated September 20, 1995, by and
            between the Registrant and Thomas M. Siebel. (1)
  10.10     Lease Agreement, dated June 4, 1996, by and between the
            Registrant and Crossroad Associates and Clocktower
            Associates. (1)
  10.11     InterActive WorkPlace, Inc. 1996 Stock Option Plan. (5)
   23.1     Consent of KPMG Peat Marwick LLP, Independent Certified Public 
            Accountants. (5)
   23.2     Consent of Cooley Godward LLP. Reference is made to
            Exhibit 5.1. (5)
   24.1     Power of Attorney. Reference is made to the signature
            page. (5)
___________
(1) Incorporated by reference to the Company's Registration Statement on Form S-
    1 (No. 333-03751), as amended.
(2) Confidential treatment has been granted with respect to portions of this
    exhibit.
(3) Incorporated by reference to the Company's Registration Statement on Form S-
    8 (No. 333-07983), as amended.
(4) Incorporated by reference to the Company's Annual Report on Form 10-K for
    the fiscal year ended December 31, 1996.
(5) Filed herewith.

     (b)  Financial Statement Schedules

     Schedules not listed above have been omitted because the information to be
set forth therein is not applicable or is shown in the financial statements or
notes thereto.

UNDERTAKINGS

     The undersigned registrant hereby undertakes:

     (1) To file, during any period in which offers or sales are being made, a
post-effective amendment to this registration statement to include any material
information with respect to the plan of distribution not previously disclosed in
the registration statement or any material change to such information in the
registration statement:

         (i) To include any prospectus required by Section 10(a)(3) of The
Securities Act of 1933.

         (ii) To reflect in the prospectus any facts or events arising after
the effective date of the registration statement (or the most recent post-
effective amendment thereof) which, individually or in the aggregate, represent
a fundamental change in the information set forth in the registration statement.
Notwithstanding the foregoing, any increase or decrease in volume of securities
offered (if the total dollar value of securities offered would not exceed that
which was registered) and any deviation from the low or high and of the

                                      II-2
<PAGE>
 
estimated maximum offering range may be reflected in the form of prospectus
filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the
changes in volume and price represent no more than 20 percent change in the
maximum aggregate offering price set forth in the "Calculation of Registration
Fee" table in the effective registration statement.

         (iii)  To include any material information with respect to the plan of
distribution not previously disclosed in the registration statement or any
material change to such information in the registration statement.

     Provided, however, that paragraphs (a) (1) (i) and (a) (1) (ii) do not
     -----------------
apply if the information required to be included in a post-effective amendment
by those paragraphs is contained in periodic reports filed with or furnished to
the Commission by the registrant pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934 that are incorporated by reference in the
registration statement.

     (2) That, for the purpose of determining any liability under the Securities
Act, each post-effective amendment that contains a form of prospectus shall be
deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.

     (3) To remove from registration by means of a post-effective amendment any
of the securities being registered which remain unsold at the termination of the
offering.

     (4) The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
registrant's annual report pursuant to Section 13(a) or 15(d) of the Securities
Exchange Act of 1934 that is incorporated by reference in the registration
statement shall be deemed to be a new registration statement relating to the
securities offered therein, and the offering of such securities at that time
shall be deemed to be the initial bona fide offering thereof.

     (5) Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors, officers and controlling persons of the
registrant pursuant to provisions described in Item 15, or otherwise, the
registrant has been advised that in the opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the
Securities Act and is, therefore, unenforceable.  In the event that a claim for
indemnification against such liabilities (other than the payment by the
registrant of expenses incurred or paid by a director, officer or controlling
person of the registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Securities
Act and will be governed by the final adjudication of such issue.

                                      II-3
<PAGE>
 
                                   SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, as amended, the
Registrant has duly caused this Registration Statement to be signed on its
behalf by the undersigned, thereunto duly authorized, in the City of San Mateo,
County of San Mateo, State of California on the 29th day of September, 1997.

                                          /s/ Thomas M. Siebel
                                      By:_______________________________________
                                                    Thomas M. Siebel
                                           President and Chief Executive Officer
                                           -------------------------------------

                               POWER OF ATTORNEY

     KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints Thomas M. Siebel and Howard H. Graham and
each of them, as his true and lawful attorneys-in-fact and agents, with full
power of substitution and resubstitution, for him and in his name, place, and
stead, in any and all capacities, to sign any and all amendments (including
post-effective amendments, exhibits thereto and other documents in connection
therewith) to this Registration Statement and any subsequent registration
statement filed by the registrant pursuant to Securities and Exchange Commission
Rule 462, which relates to this Registration Statement, and to file the same,
with all exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, granting unto said attorneys-in-fact and
agents, and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in connection therewith,
as fully to all intents and purposes as he might or could do in person, hereby
ratifying and confirming all that said attorneys-in-fact and agents, or any of
them, or their or his substitute or substitutes, may lawfully do or cause to be
done by virtue hereof.

     Pursuant to the requirements of the Securities Act of 1933, as amended,
this Registration Statement has been signed by the following persons in the
capacities and on the dates indicated:

        SIGNATURE                        TITLE                         DATE
        ---------                        -----                         ----

/s/ Thomas M. Siebel        Chairman, Chief Executive        September 29, 1997
- --------------------------  Officer and Director
Thomas M. Siebel            (Principal Executive Officer)
               
                            

/s/ Howard H. Graham        Senior Vice President Finance    September 30, 1997
- --------------------------  and Administration and Chief  
Howard H. Graham            Financial Officer            
                            (Principal Financial and     
                            Accounting Officer)           

/s/ Eric E. Schmidt         Director                         September 28, 1997
- --------------------------  
Eric E. Schmidt            

/s/ James C. Gaither        Director                         September 29, 1997
- --------------------------  
James C. Gaither            

/s/ George T. Shaheen       Director                         September 30, 1997
- --------------------------  
George T. Shaheen           

/s/ Charles R. Schwab       Director                         September 29, 1997
- --------------------------  
Charles R. Schwab           

/s/ A. Michael Spence       Director                         September 27, 1997
- --------------------------  
A. Michael Spence          

                                      II-4

<PAGE>
                                                                     EXHIBIT 4.4

 
                              SIEBEL SYSTEMS, INC.

                         Registration Rights Agreement

                                October __, 1997
<PAGE>
 
Article 1.     General.....................................................  1
 
     1.1       Definitions.................................................  1
 
Article 2.     Registration; Restrictions on Transfer......................  2
 
     2.1       Restrictions on Transfer....................................  2
 
     2.2       Form S-3 Registration.......................................  3
 
     2.3       Automatic S-3 Registration..................................  4
 
     2.4       Expenses of Registration....................................  4
     2.5       Obligations of the Company..................................  5
     2.6       Termination of Registration Rights..........................  5
     2.7       Delay of Registration.......................................  5
     2.8       Indemnification.............................................  5
     2.9       No Assignment of Registration Rights........................  7
 
Article 3.     Miscellaneous...............................................  7
 
     3.1       Governing Law...............................................  7
 
     3.2       Successors and Assigns......................................  8
     3.3       Separability................................................  8
     3.4       Amendment and Waiver........................................  8
     3.5       Delays or Omissions.........................................  8
     3.6       Notices.....................................................  8
     3.7       Titles and Subtitles........................................  8
     3.8       Counterparts................................................  8
 
                                      1.
<PAGE>
 
                         REGISTRATION RIGHTS AGREEMENT


  THIS REGISTRATION RIGHTS AGREEMENT (the "Agreement") is entered into as of the
____ day of October, 1997, by and among SIEBEL SYSTEMS, INC., a Delaware
corporation (the "Company"), and the persons and entities set forth on Exhibit A
attached hereto.  Such persons and entities shall be referred to hereinafter as
the "Purchasers" and each individually as a "Purchaser."


                                    RECITALS


          WHEREAS, the Company has entered into an Agreement and Plan of Merger
and Reorganization with InterActive WorkPlace, Inc. ("InterActive") and certain
stockholders of InterActive, dated as of September 13, 1997 (the "Acquisition
Agreement"), pursuant to which the Company will issue shares (the "Shares") of
the Company's Common Stock, par value of $.001 per share ("Common Stock"), to
the stockholders of InterActive (the "Stockholders") in connection with the
merger of a subsidiary of the Company with and into InterActive; and

          WHEREAS, the Acquisition Agreement provides that the Stockholders be
granted certain registration rights with respect to the Shares as set forth in
the Agreement;


  NOW, THEREFORE, in consideration of the mutual promises, representations,
warranties, covenants and conditions set forth in this Agreement and in the
Acquisition Agreement, the parties mutually agree as follows:


                                   ARTICLE 1


                                    GENERAL


     1.1  DEFINITIONS  As used in this Agreement the following terms shall have
the following respective meanings:


     "FORM S-3" means such form under the Securities Act as in effect on the
date hereof or any successor registration form under the Securities Act
subsequently adopted by the SEC which permits inclusion or incorporation of
substantial information by reference to other documents filed by the Company
with the SEC.

     "HOLDER" means any person owning of record Registrable Securities.

     "REGISTER," "REGISTERED," AND "REGISTRATION" refer to a registration
effected by preparing and filing a registration statement in compliance with the
Securities Act, and the declaration or ordering of effectiveness of such
registration statement or document.

     "REGISTRABLE SECURITIES" means (i) the Shares; (ii) any Common Stock issued
as (or issuable upon the conversion or exercise of any warrant, right or other
security which is issued as) a dividend or other distribution with respect to,
or in exchange for or in replacement of, the Shares. Notwithstanding the
foregoing, Registrable Securities shall not include (i) any securities sold by a
person to the public either pursuant to a registration statement or Rule 144 or
sold in a private transaction (other than as a result of any transfer pursuant
to Section 2.1(iii) hereof) or (ii) any securities which may be sold by a Holder
under Rule 144 during any ninety (90) day period.

     "REGISTRATION EXPENSES" shall mean all expenses incurred by the Company in
complying with Section 2.2 hereof, including, without limitation, all
registration and filing fees, printing expenses, fees 

                                      1.
<PAGE>
 
and disbursements of counsel for the Company, blue sky fees and expenses and the
expense of any special audits incident to or required by any such registration
(but excluding the compensation of regular employees of the Company which shall
be paid in any event by the Company).

     "SEC" OR "COMMISSION" means the Securities and Exchange Commission.

     "SECURITIES ACT" shall mean the Securities Act of 1933, as amended.

     "SELLING EXPENSES" shall mean all underwriting discounts and selling
commissions applicable to the sale.


                                   ARTICLE 2


                     REGISTRATION; RESTRICTIONS ON TRANSFER


     2.1  RESTRICTIONS ON TRANSFER


          (a)  Each Holder agrees not to make any disposition of all or any
portion of the Registrable Securities unless and until the transferee has agreed
in writing for the benefit of the Company to be bound by this Section 2.1,
provided and to the extent such Section is then applicable.  This Section shall
not be applicable if:


               (i)  There is then in effect a registration statement under the
Securities Act covering such proposed disposition and such disposition is made
in accordance with such registration statement; or

               (ii) (A) Such Holder shall have notified the Company of the
proposed disposition and shall have furnished the Company with a detailed
statement of the circumstances surrounding the proposed disposition, and (B) if
reasonably requested by the Company, such Holder shall have furnished the
Company with an opinion of counsel, reasonably satisfactory to the Company, that
such disposition will not require registration of such Shares under the
Securities Act. It is agreed that the Company will not require opinions of
counsel for transactions made pursuant to Rule 144; or

               (iii) There is a transfer by a Holder which is (A) a partnership
to its partners in accordance with partnership interests, or (B) to the Holder's
family member or trust for the benefit of an individual Holder, provided the
transferee will be subject to the terms of this Section 2.1 to the same extent
as if he were an original Holder hereunder (it being agreed that the Company
will not require opinions of counsel for such transfers).

          (b)  Each certificate representing the Shares shall (unless otherwise
permitted by the provisions of the Agreement) be stamped or otherwise imprinted
with legends substantially similar to the following (in addition to any legend
required under applicable state securities laws or as provided elsewhere in the
Agreement):


   THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE
   SECURITIES ACT OF 1933 (THE "ACT") AND MAY NOT BE OFFERED, SOLD OR 
   OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED UNLESS AND UNTIL 
   REGISTERED UNDER THE ACT OR, IN THE OPINION OF COUNSEL OR BASED ON
   OTHER WRITTEN EVIDENCE IN FORM AND SUBSTANCE SATISFACTORY TO THE 
   ISSUER OF THESE 

                                      2.
<PAGE>
 
   SECURITIES, SUCH OFFER, SALE OR TRANSFER, PLEDGE OR HYPOTHECATION IS IN
   COMPLIANCE THEREWITH.


          (c)  The Company shall be obligated to reissue promptly unlegended
certificates at the request of any Holder thereof if the Holder shall have
obtained an opinion of counsel (which counsel may be counsel to the Company)
reasonably acceptable to the Company to the effect that the securities proposed
to be disposed of may lawfully be so disposed of without registration,
qualification or legend.

          (d)  Any legend endorsed on an instrument pursuant to applicable state
securities laws and the stop-transfer instructions with respect to such
securities shall be removed upon receipt by the Company of an order of the
appropriate blue sky authority authorizing such removal.


     2.2 FORM S-3 REGISTRATION.  In case the Company shall receive from any
Holder or Holders of Registrable Securities (other than any Holder who has
elected not to be included in the Registration Statement referred to in Section
2.3 hereof) a written request or requests that the Company effect a registration
on Form S-3 and any related qualification or compliance with respect to all or a
part of the Registrable Securities owned by such Holder or Holders, the Company
will:


          2.2.1  promptly give written notice of the proposed registration, and
any related qualification or compliance, to all other Holders of Registrable
Securities; and

          2.2.2  as soon as practicable, effect such registration and all such
qualifications and compliances as may be so requested and as would permit or
facilitate the sale and distribution of all or such portion of such Holder's
Registrable Securities as are specified in such request, together with all or
such portion of the Registrable Securities of any other Holder or Holders
joining in such request as are specified in a written request given within
fifteen (15) days after receipt of such written notice from the Company;
provided, however, that the Company shall not be obligated to effect any such
registration, qualification or compliance pursuant to this Section 2.2: (i) if
Form S-3 is not available for such offering by the Holders, (ii) if the Holders,
together with the holders of any other securities of the Company entitled to
inclusion in such registration, propose to sell Registrable Securities at an
aggregate price to the public of less than $1,000,000, (iii) if the Company
shall furnish to the Holders a certificate signed by the Chief Executive Officer
of the Board of Directors of the Company stating that in the good faith judgment
of the Board of Directors of the Company, it would be seriously detrimental to
the Company and its shareholders for such Form S-3 Registration to be effected
at such time, in which event the Company shall have the right to defer the
filing of the Form S-3 registration statement until such time as any material
non-public information about the Company has been disclosed to the public or
ceases to be material and in any case for a period of not more than ninety (90)
days after receipt of the request of the Holder or Holders under this Section
2.2, provided that such right to delay a request shall be exercised by the
Company no more than once in any 12-month period; and provided further, that if
requested by the Holder or Holders of Registrable Securities representing a
majority of Registrable Securities which are or were to be included in such
registration, the Holders will be entitled to withdraw such request and if such
request is withdrawn, such registration shall not (subject to Section 2.4) count
as a registration pursuant to this Section 2.2 (iv) if the Company has already
effected one (1) registration on Form S-3 for the Holders pursuant to this
Section 2.2 (in addition to the automatic Form S-3 registration statement to be
effected pursuant to the Acquisition Agreement, as described in Section 2.3
below or (v) in any particular jurisdiction in which the Company would be
required to qualify to do business or to execute a general consent to service of
process in effecting such registration, qualification or compliance.

                                      3.
<PAGE>
 
          2.2.3  Subject to the foregoing, the Company shall file a Form S-3
registration statement covering the Registrable Securities so requested to be
registered as soon as practicable after receipt of the request or requests of
the Holders.

          2.2.4  Notwithstanding any other provision of this Agreement, the
Holders understand that there may be periods during which the Company's Board of
Directors may determine, in good faith, that it is in the best interest of the
Company and its stockholders to defer disclosure of non-public information until
such information has reached a more advanced stage and that during such periods
sales of Registrable Securities and the effectiveness of any registration
statement covering Registrable Securities may be suspended or delayed.  Each
Holder agrees by acquisition of such Registrable Securities that upon receipt of
any notice from the Company of the development of any non-public information,
such Holder will forthwith discontinue such Holder's disposition of Registrable
Securities pursuant to the registration statement relating to such Registrable
Securities until such Holder's receipt of copies of an appropriately
supplemented or amended prospectus and, if so directed by the Company, such
Holder will use its best efforts to deliver to the Company (at the Company's
expense) all copies, other than permanent file copies then in such Holder's
possession, of the prospectus relating to such Registrable Securities current at
the time of receipt of such notice.  In the event the Company shall give any
such notice, the applicable time period during which a Registration Statement is
to remain effective shall be extended by the number of days during the period
from and including the date of the giving of such notice to and including the
date when each seller of a Registrable Security covered by such registration
statement shall have received the copies of the appropriate supplemented or
amended prospectus.

          2.2.5  A registration requested pursuant to this Section 2.2 or 2.3
will not be deemed to have been effected unless it has become effective;
provided that if, after it has become effective, the offering of Registrable
Securities pursuant to such registration is interfered with by any stop order,
injunction or other order or requirement of the SEC or other governmental agency
or court which prevents the successful completion of such offering and which was
not caused by the actions of any Holder, such registration will be deemed not to
have been effected.


     2.3 AUTOMATIC S-3 REGISTRATION.  In addition to the rights provided under
Section 2.2, the Company has filed a Form S-3 registration statement covering
Registrable Securities as provided in the Acquisition Agreement.  In accordance
with the Acquisition Agreement, the Company has agreed to use its best efforts
to cause such registration statement to become effective as soon as practicable
after the release of the Company's financial results for the quarter ending
September 30, 1997, and, in any event, not later than November 15, 1997.
Subject to Section 2.2.4, the Company agrees to keep such registration statement
effective until the earlier of: (i) one (1) year (or such longer period in the
event of a blackout period as described in Section 2.2.4) or (ii) such time as
all shares of Common Stock covered by such Registration Statement are no longer
Registrable Securities.  Except as otherwise provided in this Section 2.3, the
registration statement covered by this Section 2.3 shall be subject to the
provisions of this Agreement.

     2.4 EXPENSES OF REGISTRATION.  All Registration Expenses incurred in
connection with any registration pursuant to Section 2.2 or 2.3 shall be borne
by the Company.  All Selling Expenses incurred in connection with any
registrations hereunder, shall be borne by the holders of the securities so
registered pro rata on the basis of the number of shares so registered.  The
Company shall not, however, be required to pay for expenses of any registration
proceeding begun pursuant to Section 2.2, the request of which has been
subsequently withdrawn by the Holders unless (a) the withdrawal is based upon
material adverse information concerning the Company of which the Holders were
not aware at the time of such request or (b) the Holders of a majority of
Registrable Securities agree to forfeit their right to registration pursuant to
Section 2.2 in which event such right shall be forfeited by all Holders.  If the
Holders are required to pay 

                                      4.
<PAGE>
 
the Registration Expenses, such expenses shall be borne by the holders of
securities (including Registrable Securities) requesting such registration in
proportion to the number of shares for which registration was requested. If the
Company is required to pay the Registration Expenses of a withdrawn offering
pursuant to Section 2.4(a), then the Holders shall not forfeit their rights
pursuant to Section 2.2 to a registration.

     2.5 OBLIGATIONS OF THE COMPANY.  Whenever required to effect the
registration of any Registrable Securities, the Company shall, as expeditiously
as reasonably possible:

          2.5.1  Prepare (and provide the Holders an opportunity to review) and
file with the SEC a registration statement with respect to such Registrable
Securities and use its best efforts to cause such registration statement to
become effective, and, upon the request of the Holders of a majority of the
Registrable Securities registered thereunder, keep such registration statement
effective for up to the earlier of: (i) one (1) year (or such longer period in
the event of a blackout period as described in Section 2.2.4) or (ii) such time
as all shares of Common Stock covered by such registration statement are no
longer Registrable Securities.

          2.5.2  Prepare and file with the SEC such amendments and supplements
to such registration statement and the prospectus used in connection with such
registration statement as may be necessary to comply with the provisions of the
Securities Act with respect to the disposition of all securities covered by such
registration statement.

          2.5.3  Furnish to the Holders such number of copies of a prospectus,
including a preliminary prospectus, in conformity with the requirements of the
Securities Act, and such other documents as they may reasonably request in order
to facilitate the disposition of Registrable Securities owned by them.

          2.5.4  Use its best efforts to register and qualify the securities
covered by such registration statement under such other securities or Blue Sky
laws of such jurisdictions as shall be reasonably requested by the Holders,
provided that the Company shall not be required in connection therewith or as a
condition thereto to qualify to do business or to file a general consent to
service of process in any such states or jurisdictions.

          2.5.5  Notify each Holder covered by such registration statement at
any time when a prospectus relating thereto is required to be delivered under
the Securities Act of the happening of any event as a result of which the
prospectus included in such registration statement, as then in effect, includes
an untrue statement of a material fact or omits to state a material fact
required to be stated therein or necessary to make the statements therein not
misleading in the light of the circumstances then existing.


     2.6 TERMINATION OF REGISTRATION RIGHTS.  All registration rights granted
under this Article II shall terminate and be of no further force and effect four
(4) years after the effectiveness of the last registration statement filed
pursuant to this Agreement.

     2.7 DELAY OF REGISTRATION.  No Holder shall have any right to obtain or
seek an injunction restraining or otherwise delaying any such registration as
the result of any controversy that might arise with respect to the
interpretation or implementation of this Article II.

     2.8 INDEMNIFICATION.  In the event any Registrable Securities are included
in a registration statement under Sections 2.2:

          2.8.1  To the extent permitted by law, the Company will indemnify and
hold harmless each Holder, the partners, officers and directors of each Holder,
and each person, if any, who controls such 

                                      5.
<PAGE>
 
Holder within the meaning of the Securities Act or the Securities Exchange Act
of 1934, as amended, (the "1934 Act"), against any losses, claims, damages, or
liabilities (joint or several) to which they may become subject under the
Securities Act, the 1934 Act or other federal or state law, insofar as such
losses, claims, damages or liabilities (or actions in respect thereof) arise out
of or are based upon any of the following statements, omissions or violations
(collectively a "Violation") by the Company: (i) any untrue statement or alleged
untrue statement of a material fact contained in such registration statement,
including any preliminary prospectus or final prospectus contained therein or
any amendments or supplements thereto, (ii) the omission or alleged omission to
state therein a material fact required to be stated therein, or necessary to
make the statements therein not misleading, or (iii) any violation or alleged
violation by the Company of the Securities Act, the 1934 Act, any state
securities law or any rule or regulation promulgated under the Securities Act,
the 1934 Act or any state securities law in connection with the offering covered
by such registration statement; and the Company will reimburse each such Holder,
partner, officer or director, or controlling person for any legal or other
expenses reasonably incurred by them in connection with investigating or
defending any such loss, claim, damage, liability or action; provided however,
that the indemnity agreement contained in this Section 2.8.1 shall not apply to
amounts paid in settlement of any such loss, claim, damage, liability or action
if such settlement is effected without the consent of the Company (which consent
shall not be unreasonably withheld), nor shall the Company be liable in any such
case for any such loss, claim, damage, liability or action to the extent that it
arises out of or is based upon a Violation which occurs in reliance upon and in
conformity with written information furnished expressly for use in connection
with such registration by such Holder, partner, officer, director, underwriter
or controlling person of such Holder.

          2.8.2  To the extent permitted by law, each selling Holder will
indemnify and hold harmless the Company, each of its directors, each of its
officers, each person, if any, who controls the Company within the meaning of
the Securities Act, and any other Holder selling securities under such
registration statement or any of such other Holder's partners, directors or
officers or any person who controls such Holder, against any losses, claims,
damages or liabilities (joint or several) to which the Company or any such
director, officer, controlling person, or other such Holder, or partner,
director, officer or controlling person of such other Holder may become subject
under the Securities Act, the 1934 Act or other federal or state law, insofar as
such losses, claims, damages or liabilities (or actions in respect thereto)
arise out of or are based upon any Violation, in each case to the extent (and
only to the extent) that such Violation occurs in reliance upon and in
conformity with written information furnished by such Holder under an instrument
duly executed by such Holder and stated to be specifically for use in connection
with such registration; and each such Holder will reimburse any legal or other
expenses reasonably incurred by the Company or any such director, officer,
controlling person, underwriter or other Holder, or partner, officer, director
or controlling person of such other Holder in connection with investigating or
defending any such loss, claim, damage, liability or action if it is judicially
determined that there was such a Violation; provided, however, that the
indemnity agreement contained in this Section 2.8.2 shall not apply to amounts
paid in settlement of any such loss, claim, damage, liability or action if such
settlement is effected without the consent of the Holder, which consent shall
not be unreasonably withheld; provided further, that in no event shall any
indemnity under this Section 2.8 exceed the net proceeds from the offering
received by such Holder.

          2.8.3  Promptly after receipt by an indemnified party under this
Section 2.8 of notice of the commencement of any action (including any
governmental action), such indemnified party will, if a claim in respect thereof
is to be made against any indemnifying party under this Section 2.8, deliver to
the indemnifying party a written notice of the commencement thereof and the
indemnifying party shall have the right to participate in, and, to the extent
the indemnifying party so desires, jointly with any other indemnifying party
similarly noticed, to assume the defense thereof with counsel mutually
satisfactory to the parties; provided, however, that an indemnified party shall
have the right to retain its own counsel, with 

                                      6.
<PAGE>
 
the fees and expenses to be paid by the indemnifying party, if representation of
such indemnified party by the counsel retained by the indemnifying party would
be inappropriate due to actual or potential differing interests between such
indemnified party and any other party represented by such counsel in such
proceeding. The failure to deliver written notice to the indemnifying party
within a reasonable time of the commencement of any such action, if materially
prejudicial to its ability to defend such action, shall relieve such
indemnifying party of any liability to the indemnified party under this Section
2.8, but the omission so to deliver written notice to the indemnifying party
will not relieve it of any liability that it may have to any indemnified party
otherwise than under this Section 2.8.

          2.8.4  If the indemnification provided for in this Section 2.8 is held
by a court of competent jurisdiction to be unavailable to an indemnified party
with respect to any losses, claims, damages or liabilities referred to herein,
the indemnifying party, in lieu of indemnifying such indemnified party
thereunder, shall to the extent permitted by applicable law contribute to the
amount paid or payable by such indemnified party as a result of such loss,
claim, damage or liability in such proportion as is appropriate to reflect the
relative fault of the indemnifying party on the one hand and of the indemnified
party on the other in connection with the Violation(s) that resulted in such
loss, claim, damage or liability, as well as any other relevant equitable
considerations.  The relative fault of the indemnifying party and of the
indemnified party shall be determined by a court of law by reference to, among
other things, whether the untrue or alleged untrue statement of a material fact
or the omission to state a material fact relates to information supplied by the
indemnifying party or by the indemnified party and the parties' relative intent,
knowledge, access to information and opportunity to correct or prevent such
statement or omission.

          2.8.5  The foregoing indemnity agreements of the Company and Holders
are subject to the condition that, insofar as they relate to any Violation made
in a preliminary prospectus but eliminated or remedied in the amended prospectus
on file with the SEC at the time the registration statement in question becomes
effective or the amended prospectus filed with the SEC pursuant to SEC Rule
424(b) (the "Final Prospectus"), such indemnity agreement shall not inure to the
benefit of any indemnified party if a copy of the Final Prospectus was furnished
to the indemnified party, the indemnified party had an obligation to furnish
such Final Prospectus to the person asserting the loss, liability, claim or
damage and the indemnified party did not so furnish the Final Prospectus to the
person asserting the loss, liability, claim or damage at or prior to the time
such action is required by the Securities Act.

          2.8.6  The obligations of the Company and Holders under this Section
2.8 shall survive the completion of any offering of Registrable Securities in a
registration statement, and otherwise.

     2.9 NO ASSIGNMENT OF REGISTRATION RIGHTS.  The rights to cause the Company
to register Registrable Securities pursuant to this Article II may not be
assigned by a Holder to any transferee of Registrable Securities (other than a
transferee under a transfer made pursuant to Section 2.1(iii) hereof).


                                   ARTICLE 3


                                 MISCELLANEOUS


     3.1 GOVERNING LAW.  This Agreement shall be governed by and construed under
the laws of the State of Delaware as applied to agreements among Delaware
residents entered into and to be performed entirely within Delaware.

     3.2 SUCCESSORS AND ASSIGNS.  Except as otherwise expressly provided herein,
the provisions hereof shall inure to the benefit of, and be binding upon, the
successors, assigns, heirs, executors, and administrators of the parties hereto.


                                      7.
<PAGE>
 
     3.3 SEPARABILITY.  In case any provision of the Agreement shall be invalid,
illegal, or unenforceable, the validity, legality, and enforceability of the
remaining provisions shall not in any way be affected or impaired thereby.

     3.4 AMENDMENT AND WAIVER.

          3.4.1  Except as otherwise expressly provided, this Agreement may be
amended or modified only upon the written consent of the Company and the holders
of at a majority of the then outstanding Registrable Securities.

          3.4.2  Except as otherwise expressly provided, the obligations of the
Company and the rights of the Holders under this Agreement may be waived only
with the written consent of the holders of at least a majority of the
Registrable Securities.

     3.5 DELAYS OR OMISSIONS.  It is agreed that no delay or omission to
exercise any right, power, or remedy accruing to any Holder, upon any breach,
default or noncompliance of the Company under this Agreement shall impair any
such right, power, or remedy, nor shall it be construed to be a waiver of any
such breach, default or noncompliance, or any acquiescence therein, or of any
similar breach, default or noncompliance thereafter occurring.  It is further
agreed that any waiver, permit, consent, or approval of any kind or character on
any Holder's part of any breach, default or noncompliance under the Agreement or
any waiver on such Holder's part of any provisions or conditions of this
Agreement must be in writing and shall be effective only to the extent
specifically set forth in such writing.  All remedies, either under this
Agreement, by law, or otherwise afforded to Holders, shall be cumulative and not
alternative.

     3.6 NOTICES.  All notices required or permitted hereunder shall be in
writing and shall be deemed effectively given: (i) upon personal delivery to the
party to be notified, (ii) when sent by confirmed telex or facsimile if sent
during normal business hours of the recipient; if not, then on the next business
day, (iii) five (5) days after having been sent by registered or certified mail,
return receipt requested, postage prepaid, or (iv) one (1) day after deposit
with a nationally recognized overnight courier, specifying next day delivery,
with written verification of receipt.  All communications shall be sent to the
party to be notified at the address as set forth on the signature page or at
such other address as such party may designate by ten (10) days advance written
notice to the other parties hereto.

     3.7 TITLES AND SUBTITLES.  The titles of the sections and subsections of
this Agreement are for convenience of reference only and are not to be
considered in construing this Agreement.

     3.8 COUNTERPARTS.  This Agreement may be executed in any number of
counterparts, each of which shall be an original, but all of which together
shall constitute one instrument.

                                      8.
<PAGE>
 
  IN WITNESS WHEREOF, the parties hereto have executed this Registration Rights
Agreement as of the date set forth in the first paragraph hereof.


SIEBEL SYSTEMS, INC.


By:_____________________________
 

Title:__________________________

Address:

1855 South Grant Street
San Mateo, CA   94402


                                      S-1


                         REGISTRATION RIGHTS AGREEMENT
<PAGE>
 
  IN WITNESS WHEREOF, the parties hereto have executed this Registration Rights
Agreement as of the date set forth in the first paragraph hereof.



                                         PURCHASER:___________________________
 
                                         _____________________________________
                                         Print Name of Purchaser

                                         Title: ______________________________

                                         Address:

                                         _____________________________________
 
                                         _____________________________________


                                      S-2

                         REGISTRATION RIGHTS AGREEMENT
<PAGE>
 
                                   EXHIBIT A

                                        


                         REGISTRATION RIGHTS AGREEMENT

                             SCHEDULE OF PURCHASERS


Kenneth C. Jeffers

Michael T. Howard

Salem Partners, L.P

Windhorse Corporation

Telluride Venture Partners, L.P.

Gregory Craig

Jurgen Leschner

Shaun T. Logan

Brian C. Rowles

Wendy A. Hassan

Thaddeus W. Batt

Rodd Halstead


                                      A-1

<PAGE>
 
                [LETTERHEAD OF COOLEY GODWARD LLP APPEARS HERE]

October 1, 1997

Siebel Systems, Inc.
1855 South Grant Street
San Mateo, CA 94402

Ladies and Gentlemen:

You have requested our opinion with respect to certain matters in connection 
with the filing by Siebel Systems, Inc. (the "Company") of a Registration 
Statement on Form S-3 on October 1, 1997 (the "Registration Statement") with the
Securities and Exchange Commission (the "Commission") covering the offering of 
up to three hundred forty-six thousand three hundred seventy-nine (346,379) 
shares of the Company's Common Stock.

In connection with this opinion, we have examined and relied upon the 
Registration Statement and related Prospectus, the Company's Certificate of 
Incorporation and Bylaws, as amended, and the originals or copies certified to 
our satisfaction of such records, documents, certificates, memoranda and other 
instruments as in our judgement are necessary or appropriate to enable to render
the opinion expressed below. We have assumed the genuineness and authenticity of
all documents submitted to us as copies thereof, and the due execution and 
delivery of all documents where due execution and delivery are a prerequisite to
the effectiveness thereof.

On the basis of the foregoing, and in reliance thereon, we are of the opinion 
that the Common Stock, when sold and issued in accordance with the Registration 
Statement and related Prospectus, will be validly issued, fully paid and 
nonassessable.

We consent to the reference to our firm under the caption "Legal Matters" in the
Prospectus included in the Registration Statement and to the filing of this 
opinion as an exhibit to the Registration Statement.

Yours very truly,

COOLEY GODWARD LLP

/s/ Eric C. Jensen
Eric C. Jensen


<PAGE>
                                                                   EXHIBIT 10.11

 
                          INTERACTIVE WORKPLACE, INC.

                             1996 STOCK OPTION PLAN
<PAGE>
 
                          INTERACTIVE WORKPLACE, INC.

                             1996 STOCK OPTION PLAN

                               TABLE OF CONTENTS

                                                       Page

 
 1.  PURPOSE..........................................   1
 2.  ADMINISTRATION OF THE PLAN.......................   1
 3.  OPTION SHARES....................................   1
 4.  AUTHORITY TO GRANT OPTIONS.......................   2
 5.  WRITTEN AGREEMENT................................   2
 6.  ELIGIBILITY......................................   2
 7.  OPTION PRICE.....................................   3
 8.  DURATION OF OPTIONS..............................   3
 9.  RESTRICTION ON EXERCISE OF OPTIONS...............   4
10.  EXERCISE OF OPTIONS..............................   4
11.  NONTRANSFERABILITY OF OPTIONS....................   5
12.  TERMINATION OF EMPLOYMENT OR INVOLVEMENT OF
     OPTIONEE WITH THE COMPANY........................   5
13.  REQUIREMENTS OF LAW..............................   6
14.  NO RIGHTS AS STOCKHOLDER.........................   7
15.  EMPLOYMENT OBLIGATION............................   7
16.  FORFEITURE AS A RESULT OF TERMINATION FOR CAUSE..   7
17.  CHANGES IN THE COMPANY'S CAPITAL STRUCTURE.......   8
18.  AMENDMENT OR TERMINATION OF PLAN.................  10
19.  CERTAIN RIGHTS OF THE COMPANY....................  10
20.  EFFECTIVE DATE AND DURATION OF THE PLAN..........  11
 
<PAGE>
 
                          InterActive WorkPlace, Inc.

                             1996 STOCK OPTION PLAN
     1.   PURPOSE

     The purpose of this 1996 Stock Option Plan (the "Plan") is to encourage
                                                      ----                  
directors, consultants and key employees of InterActive WorkPlace, Inc. (the
                                                                            
"Company") and its Subsidiaries (as hereinafter defined) to continue their
- --------                                                                  
association with the Company, by providing favorable opportunities for such
persons to participate in the ownership of the Company and in its future growth
through the granting of stock options (the "Options") which may either be
                                            -------                      
options designed to qualify as "incentive stock options" within the meaning of
Section 422 of the Internal Revenue Code of 1986, as amended (the "Code") (an
                                                                   ----      
"ISO") or options not intended to qualify for any special tax treatment under
- ----                                                                         
the Code (a "NQO").  The term "Subsidiary" as used in the Plan means a
             ---                                                      
corporation of which the Company owns, directly or indirectly through an
unbroken chain of ownership, fifty percent (50%) or more of the total combined
voting power of all classes of stock.  A person to whom an Option has been
granted pursuant to the Plan is hereinafter referred to as an "Optionee".
                                                               --------  

     2.   ADMINISTRATION OF THE PLAN

     The Plan shall be administered by the Board of Directors, which shall have
the authority to adopt, amend and rescind such rules and regulations as, in its
opinion, may be advisable in the administration of the Plan.  All questions of
interpretation and application of such rules and regulations, of the Plan or of
Options granted thereunder shall be subject to the determination, which shall be
final and binding, of a majority of the Board of Directors.  The Plan shall be
administered in such a manner as to permit those Options granted hereunder and
specially designated under Section 4 hereof to qualify as "incentive stock
options" as described in Section 422A of the Code.

     3.   OPTION SHARES

     The stock subject to Options under the Plan shall be shares of the
Company's common stock, par value $0.001 per share (the "Stock").  At no time
                                                         -----               
shall the number of shares of Stock with respect to which outstanding Options
have been granted plus the number of shares of Stock issued as a result of the
exercise of options under the Plan and which are still outstanding exceed in the
aggregate 1,350,000 shares (the "Option Pool"); provided that such aggregate
                                 -----------                                
number of shares shall be subject to adjustment in accordance with the
provisions of Section 17.  In the event that any outstanding Option shall expire
for any reason or shall terminate by reason of the death or severance of
employment of the Optionee, the surrender of any such Option, or any other
cause, the shares of Stock allocable to the unexercised portion of such Option
may again be subject to an option under the Plan.  Should the Company repurchase
any shares of Stock which were acquired pursuant to the exercise of options
granted under the Plan, such shares may be 

                                      1.
<PAGE>
 
returned to the Option Pool pursuant to a vote of the Board of Directors,
subject, however, to the Option Pool size limitation set forth above.

     4.   AUTHORITY TO GRANT OPTIONS

     The Board of Directors may grant from time to time, to such eligible
individuals as it shall from time to time determine, an Option or Options to buy
a stated number of shares of Stock under the terms and conditions of the Plan,
each of which Option or Options shall be designated at the time of grant as
either an ISO or a NQO.  Subject only to any applicable limitations set forth
elsewhere in the Plan, the number of shares of Stock to be covered by any Option
shall be as determined by the Board of Directors.

     5.   WRITTEN AGREEMENT

     Options granted hereunder shall be embodied in written option agreements
(which need not be identical) in such forms as the Board of Directors may from
time to time approve (each an "Option Agreement").  Option Agreements shall be
                               ----------------                               
subject to the terms and conditions prescribed herein and shall be signed by the
Optionee and by the President or any Vice President of the Company for and in
the name and on behalf of the Company.  An Option Agreement shall indicate
whether the subject Option has been designated an ISO or a NQO.  The written
Option Agreement for any Option may contain such provisions not inconsistent
with this Plan as the Board of Directors in its discretion may deem advisable.

     6.   ELIGIBILITY

     The individuals who shall be eligible for grant of Options under the Plan
shall be key employees (including officers who may be members of the Board),
directors who are not employees and other individuals who render services of
special importance to the management, operation, or development of the Company
or a Subsidiary, and who have contributed or may be expected to contribute
materially to the success of the Company or a Subsidiary.  No Option designated
as an ISO shall be granted to any individual who is not an employee of the
Company or a Subsidiary.

     If required to insure compliance with Section 16 of the Securities Exchange
Act of 1934 (the "Exchange Act"), the selection of a director as a participant
                  ------------                                                
and the number of shares for which an Option may be granted to such director
shall be determined either (i) by the Board of Directors, of which a majority,
as well as a majority of the directors acting in the matter, shall be
"disinterested persons" (as hereinafter defined) or (ii) by, or only in
accordance with, the recommendations of a committee of three or more persons
having full authority to act in the matter, of which all members shall be
"disinterested persons".  For purposes of the Plan, a director or member of such
committee shall be deemed to be "disinterested" only if such person qualifies as
a "disinterested person" within the meaning of Rule 16b-3 under the Exchange
Act, or any successor rule, as such term is interpreted from time to time.

                                      2.
<PAGE>
 
     7.   OPTION PRICE

     The price at which shares may be purchased pursuant to an Option shall be
specified by the Board of Directors at the time the Option is granted, but shall
in no event be less than the par value of such shares and, in the case of an
incentive stock option, except, as set forth in the following sentence, shall
not be less than one hundred percent (100%) of the fair market value of the
shares of Stock on the date the ISO is granted.  In the case of' any employee
who owns (or is considered under Section 424(d) of the Code as owning) stock
possessing more than ten percent (10%) of the total combined voting power of all
classes of stock of the Company or any Subsidiary, the price at which shares may
be so purchased pursuant to an incentive stock option shall be not less than one
hundred ten percent (110%) of the fair market value of the Stock on the date the
ISO is granted.

     For purposes of the Plan, the "fair market value" of a share of' Stock on
any date specified herein shall mean (a) the last reported sales price, regular
way, or, in the event that no sale takes place on such day, the average of the
reported lowest closing bid and asked prices, regular way, in either case (i) as
reported On the New York Stock Exchange Composite Tape, or (ii) if the Stock is
not listed or admitted to trading on the New York Stock Exchange, on the
principal national securities exchange on which such security is listed or
admitted to trading, or (iii) if not then listed or admitted to trading on any
national securities exchange, on the NASDAQ National Market System; or (b) if'
the stock is not quoted on such National Market System, (i) the average of the
closing bid and asked prices on each such day in the over-the-counter market as
reported by NASDAQ, or (ii) if bid and asked prices for such security on each
such day shall not have been reported through NASDAQ, the average of the bid and
asked prices for such day as furnished by any New York Stock Exchange member
firm regularly making a market in such security selected for such purpose by the
Board of Directors; or (c) if the Stock is not then listed or admitted to
trading on any nations exchange or quoted in the over-the-counter market, the
fair value thereof determined in good faith by the Board of Directors as of a
date which is within thirty (30) days of the date as of which the determination
is to be made; provided however that any method of determining fair market value
employed by the Board of' Directors with respect to an ISO shall be consistent
with any applicable laws or regulations pertaining to "incentive stock options".

     8.   DURATION OF OPTIONS

     The duration of any Option shall be specified by the Board of Directors in
the Option Agreement, but no ISO shall be exercisable after the expiration often
(10) years from the date such Option is granted.  In the ease of any employee
who owns (or is considered under Section 424(d) of the Code as owning) stock
possessing more than ten percent (10%) of the total combined voting power of all
classes of stock of the Company or any Subsidiary, no ISO shall be exercisable
after the expiration of five (5) years from the date such Option is granted.
The Board of Directors, in its sole and absolute discretion, may extend any
Option theretofore granted 

                                      3.
<PAGE>
 
subject to the aforesaid limits and may provide that an Option shall be
exercisable during its entire duration or during any lesser period of time.

     9.   RESTRICTION ON EXERCISE OF OPTIONS

     Notwithstanding any other provision of the Plan, the aggregate fair market
value (determined as of the time the Option is granted) of the Stock with
respect to which ISOs may be exercisable for the first time by an Optionee
during any calendar year (under the Plan or any other incentive stock option
plan(s) of the Company or any Subsidiary) shall not exceed $100,000.  Subject to
the foregoing, each Option may be exercised so long as it is valid and
outstanding from time to time, in part or as a whole, in such manner and subject
to such conditions as the Board of Directors, in its sole and absolute
discretion, may provide in the Option Agreement.

     10.  EXERCISE OF OPTIONS

     Each Option may be exercised from time to time in such amounts as is
provided in the Option Agreement by the delivery of written notice to the
Company setting forth the number of shares with respect to which the Option is
to be exercised, accompanied by payment of the option price of such shares,
which payment shall be made, subject to the alternative provisions of this
Section, in cash or by such cash equivalents, payable to the order of the
Company in an amount in United States dollars equal to the option price of such
shares, as the Board of Directors in its discretion shall consider acceptable.
Such notice shall be delivered in person to the Secretary of the Company or
shall be sent by registered mail, return receipt requested, to the Secretary of
the Company, in which ease delivery shall be deemed made on the date such notice
is deposited in the mail.

     Alternatively, payment of the option price may be made, in whole or in
part, in shares of Stock owned by the Optionee; provided, however, that the
Optionee may not make payment in shares of Stock that he acquired upon the
earlier exercise of any ISO, unless he has held the shares until at least two
(2) years after the date the ISO was granted and at least one (1) year after the
date the ISO was exercised.  If payment is made in whole or in part in shares of
Stock, then the Optionee shall deliver to the Company in payment of the option
price of the shares with respect of which such Option is exercised (i)
certificates registered in the name of such Optionee representing a number of
shares of Stock legally and beneficially owned by such Optionee, free of all
liens, claims and encumbrances of every kind and having a fair market value on
the date of delivery of such notice equal to the option price of the shares with
respect to which such Option is to be exercised, such certificates to be
accompanied by stock powers duly endorsed in blank by the record holder of the
shares represented by such certificates; and (ii) if the option price of the
shares with respect to which such Option is to be exercised exceeds such fair
market value, cash or such cash equivalents payable to the order to the Company,
in an amount in United States dollars equal to the amount of such excess, as the
Board of Directors in its discretion shall consider acceptable.  Notwithstanding
the foregoing provisions of this Section, the Board of Directors, in its sole
discretion, may refuse to accept shares of Stock in payment of the option 

                                      4.
<PAGE>
 
price of the shares with respect to which such Option is to be exercised and, in
that event, any certificates representing shares of Stock which were delivered
to the Company with such written notice shall be returned to such Optionee
together with notice by the Company to such Optionee of the refusal of the Board
of Directors to accept such shares of Stock.

     Alternatively, if the Option Agreement so specifies, payment of the option
price may be made in part by a promissory note executed by the Optionee and
collaterally secured by the Stock obtained upon exercise of the Option,
providing for repayment at such time or times as the Board of Directors shall
specify; provided, however, (a) that such promissory note shall provide for
repayment no later than five (5) years from the date of exercise and for
interest at a rate not less than the "base" rate announced on the date of
exercise by the Bank of Boston, NA., (b) that in any event an amount not less
than the par value of the shares of Stock with respect to which the Option is
being exercised must be paid in cash, cash equivalents, or shares of Stock in
accordance with this Section and (c) the payment of such exercise price by
promissory note does not violate any applicable laws or regulations, including,
without limitation, margin lending rules.  The decision as to whether to permit
partial payment by a promissory note for Stock to be issued upon exercise of any
Option granted shall rest entirely in the discretion of the Board of Directors.

     As promptly as practicable after the receipt by the Company of (i) written
notice from the Optionee setting forth the number of shares with respect to
which such Option is to be exercised and (ii) payment of the option price of
such shares in the form required by the foregoing provisions of this Section,
the Company shall cause to be delivered to such Optionee certificates
representing the number of shares with respect to which such Option has been so
exercised.

     11.  NONTRANSFERABILITY OF OPTIONS

     No Option shall be transferable by the Optionee, either voluntarily or by
operation of law, except by will or pursuant to the laws of descent and
distribution.  During the life of an Optionee, an Option shall be exercisable
only by such Optionee.

     12.  TERMINATION OF EMPLOYMENT OR INVOLVEMENT OF OPTIONEE WITH THE COMPANY

     For purposes of this Section, employment by or involvement with (in the
case of an Optionee who is not an employee) a Subsidiary shall be considered
employment by or involvement with the Company.  NQOs shall be exercisable
following an Optionee's termination of employment or involvement with the
Company to the extent provided below with respect to ISOs unless otherwise set
forth in the Option Agreement for such non-qualified options.  Except as may be
otherwise expressly provided herein, Options designated incentive stock options
shall be exercisable after the Optionee's termination of employment with the
Company only within the period of three (3) months after the date the Optionee
ceases to be in the employ of the Company, and only to the extent to which the
Optionee was entitled to exercise the Option immediately prior to the
termination of his or her employment.  If, before the date of expiration of the
Option, the 

                                      5.
<PAGE>
 
Optionee shall be retired in good standing from the employ of the Company for
reasons of age under the then established rules of the Company, the Option shall
terminate on the earlier of such date of expiration or three (3) months after
the date of such retirement. In the event of the death of the holder of an
Option before the date of expiration of such Option and while in the employ of
the Company or during the three (3) month period described in the preceding
sentence, or in the event of the retirement of the Optionee for reasons of
disability (within the meaning of Section 22(e)(3) of the Code), such Option
shall terminate on the earlier of such date of expiration or one (1) year
following the date of such death or retirement. After the death of the Optionee,
his or her executors, administrators or any persons to whom his or her Option
may be transferred by will or by the laws of descent and distribution shall have
the right at any time prior to such termination to exercise the Option to the
extent to which the Optionee was entitled to exercise the Option on the date of
his or her death.

     Authorized leave of absence or absence on military or government service
shall not constitute severance of the employment relationship between the
Company and the Optionee for purposes of the Plan, provided that either (i) such
absence is for a period of no more than ninety (90) days or (ii) the Optionee's
right to re-employment after such absence is guaranteed either by statute or by
contract.

     l3.  REQUIREMENTS OF LAW

     The Company shall not be required to sell or issue any shares of Stock upon
the exercise of any Option if the issuance of such shares shall constitute or
result in a violation by the Optionee or the Company of any provisions of any
law, statute or regulation of any governmental authority.  Specifically, in
connection with the Securities Act of 1933, as amended (the "Securities Act"),
                                                             --------------   
and any applicable state securities or "blue sky" law (a "Blue Sky Law"), upon
                                                          ------------        
exercise of any Option the Company shall not be required to issue such shares
unless the Board of Directors has received evidence satisfactory to it to the
effect that the holder of such Option will not transfer such shares except
pursuant to a registration statement in effect under the Securities Act and Blue
Sky Laws or unless an opinion of counsel satisfactory to the Company has been
received by the Company to the effect that such registration and compliance is
not required.  Any determination in this connection by the Board of Directors
shall be final, binding and conclusive.  The Company shall not be obligated to
take any other affirmative action in order to cause the exercise of an Option or
the issuance of shares of Stock pursuant thereto to comply with any law or
regulations of any governmental authority, including, without limitation, the
Securities Act or applicable Blue Sky laws.

     Notwithstanding any other provision of the Plan to the contrary, the
Company may refuse to permit transfer of shares of Stock if in the opinion of
its legal counsel such transfer would violate federal or state securities Laws
or subject the Company to liability thereunder.  Any sale, assignment, transfer,
pledge or other disposition of shares of Stock received upon exercise of any
Option (or any other shares or securities derived therefrom) which is not in
accordance with the 

                                      6.
<PAGE>
 
provisions of this section shall be void and of no effect and shall not be
recognized by the Company.

     The Company shall not be required to sell or issue any shares upon the
exercise of any Option if the Board of Directors is advised by counsel that the
issuance of such shares would result in the termination of any then effective
election of the Company to be taxed as an S corporation pursuant to the Code.

     Legend on Certificates.  The Board of Directors may cause any certificate
     ----------------------                                                   
representing shares of Stock acquired upon exercise of an Option (and any other
shares or securities derived therefrom) to bear a legend to the effect that the
securities represented by such certificate have not been registered under the
Securities Act or any applicable state securities laws, and may not be sold,
assigned, transferred, pledged or otherwise disposed of except in accordance
with the Plan and applicable agreements binding the holder and the Company or
any of its stockholders.

     14.  NO RIGHTS AS STOCKHOLDER

     No Optionee shall have rights as a stockholder with respect to shares
covered by his or her Option until the date of issuance of a stock certificate
for such shares.  Except as otherwise provided in Section 17 no adjustment for
dividends or other rights shall be made if the record date therefor is prior to
the date of issuance of such certificate.

     15.  EMPLOYMENT OBLIGATION

     Nothing in this Plan nor the granting of any Option under this Plan shall
(i) impose upon the Company or any Subsidiary any obligation to employ or
continue to employ any Optionee, or to engage or retain the services of any
person, (ii) diminish or affect the right of the Company or any Subsidiary to
terminate the employment or services of any person or (iii) affect the ability
of the Company to increase or decrease the compensation of any person.  The
existence of any Option shall not be taken into account in determining any
damages relating to termination of employment for any reason.

     16.  FORFEITURE AS A RESULT OF TERMINATION FOR CAUSE

     Notwithstanding anything to the contrary in the Plan, if the Board of
Directors determines, after full consideration of the facts presented on behalf
of both the Company and an Optionee, that

     a. the Optionee has been engaged in fraud, embezzlement, theft, commission
     of a felony or proven dishonesty in the course of his or her employment by
     or involvement with the Company or a Subsidiary, which damaged the Company
     or a Subsidiary, or has made unauthorized disclosure of trade secrets or
     other proprietary information of the Company

                                      7.
<PAGE>
 
     or a Subsidiary or of a third party who has entrusted such information to
     the Company or a Subsidiary, or

     b. the Optionee's employment or involvement was otherwise terminated for
     "cause", as defined in any employment agreement with the Optionee, if
     applicable, or if there is no such agreement, as determined by the Board of
     Directors, which may determine that "cause" includes among other matters
     the failure or inability of the Optionee to carry out his or her assigned
     duties diligently and in a manner satisfactory to the Company,

then the Optionee's fight to exercise an Option shall terminate as of the date
of such act (in the case of (16.a)) Or such termination (in the case of (16b))
and the Optionee shall forfeit all unexercised Options.  If an Optionee whose
behavior the Company asserts falls within the provisions of (16.a) or (16.  b)
above has exercised or attempts to exercise an Option prior to a decision of the
Board of Directors, the Company shall not be required to recognize such exercise
until the Board of Directors has made its decision and, in the event of any
exercise shall have taken place, it shall be of no force and effect (and void ab
initio) if the Board of Directors makes an adverse determination; provided,
however, if the Board of Directors finds in favor of the Optionee then the
Optionee will be deemed to have exercised such Options retroactively as of the
date he or she originally gave written notice of his or her attempt to exercise
or actual exercise, as the case may be.  The decision of the Board of Directors
as to the cause of an Optionee's discharge and the damage done to the Company or
a Subsidiary shall be final, binding and conclusive.  No decision of the Board
of Directors, however, shall affect in any manner the finality of the discharge
of such Optionee by the Company or a Subsidiary.

     17.  CHANGES IN THE COMPANY'S CAPITAL STRUCTURE

     The existence of outstanding Options shall not affect in any way the right
or power of the Company or its stockholders to make or authorize any
adjustments, recapitalizations, reorganizations or other changes in the
Company's capital structure or its business or any merger or consolidation of
the Company or any issue of bonds, debentures, preferred or preference stock,
whether or not convertible into the Stock or other securities, ranking prior to
the Stock or affecting the rights thereof, or warrants, rights or options to
acquire the same, or the dissolution or liquidation of the Company or any sale
or transfer of all or any part of its assets or business or any other corporate
act or proceeding, whether of a similar character or otherwise.

     The number of shares of Stock in the Option Pool (less the number of shares
theretofore delivered upon exercise of Options) and the number of shares of
Stock covered by any outstanding Option and the price per share payable upon
exercise thereof (provided that in no event shall the option price be less than
the par value of such shares) shall be proportionately adjusted for any increase
or decrease in the number of issued and outstanding shares of Stock resulting
from the subdivision, split, combination or consolidation of shares of Stock or
any other capital adjustment, the payment of a stock dividend or any other
increase in such shares effected without receipt of consideration by the Company
or any other decrease therein effected without a 

                                      8.
<PAGE>
 
distribution of cash or property in connection therewith, provided, however,
that no adjustment shall be made that would constitute a modification as defined
in Section 424(h)(3) of the Code.

     In the event the Company merges or consolidates with a wholly-owned
subsidiary for the purpose of reincorporating itself under the laws of another
jurisdiction, the Optionees will be entitled to acquire shares of the common
stock of the reincorporated Company upon the same terms and conditions as were
in effect immediately prior to such reincorporation (unless such reincorporation
involves a change in the number of shares, in which case proportional
adjustments shall be made as provided above) and the Plan, unless otherwise
rescinded by the Board, will remain the Plan of the reincorporated Company.

Except as otherwise provided in the preceding paragraph, if the Company is
merged or consolidated with another corporation, whether or not the Company is
the surviving entity, or if the Company is liquidated or sells or otherwise
disposes of all or substantially all of its assets to another entity while
unexercised Options remain outstanding under the Plan, or in other circumstances
in which the Board in its sole and absolute discretion deems it appropriate for
the provisions of this paragraph to apply, (a) subject to the provisions of
clause (c) below, after the effective date of such merger, consolidation,
liquidation, sale or other event (in each case, an "Applicable Event", as the
                                                    ----------------         
case may be, each holder of an outstanding Option shall be entitled.  upon
exercise of such Option, to receive in lieu of shares of Stock, such stock or
other securities or property as he or she would have received had he exercised
such option immediately prior to the Applicable Event; (b) the Board may, in its
sole and absolute discretion, waive, generally or in more specific cases, any
limitations imposed pursuant to Section 9 (even if the effect of such waiver is
to disqualify the Option, as an ISO) or Section 19 so that some or all Options
from and after a date prior to the effective date of such Applicable Event
specified by the Board, in its sole and absolute discretion, shall be
exercisable in full; and (c) all outstanding and unexercised Options may, in its
sole and absolute discretion, be cancelled by the Board as of the effective date
of any such Applicable Event; provided, however, notice of any such cancellation
shall be given to each holder of an Option not less than thirty (30) days
preceding the effective date of such Applicable Event; and provided further,
however, that the Board may in its sole and absolute discretion, waive,
generally or in one or more specific instances, any limitations imposed pursuant
to Section 9 (even if the effect of such waiver is to disqualify the Option as
an ISO) or Section 19 with respect to any Option so that such Option shall be
exercisable in full or in part, as the Board may, in its sole and absolute
discretion, determine, during such thirty (30) day period.

     Except as expressly provided herein, the issue by the Company of shares of
Stock or other securities of any class or securities convertible into or
exchangeable or exercisable for shares of Stock or other securities of any class
for cash or property or for labor or services either upon direct sale or upon
the exercise of rights or warrants to subscribe therefor, or upon conversion of
shares or obligations of the Company convertible into such shares or other
securities, shall not affect, and no adjustment by reason thereof shall be made
with respect to, the number, class or price of shares of Stock then subject to
outstanding Options.

                                      9.
<PAGE>
 
     18.  AMENDMENT OR TERMINATION OF PLAN

     The Board may, in its sole and absolute discretion, modify, revise or
terminate the Plan at any time and from time to time; provided, however, that
without the further approval of the holders of at least a majority of the
outstanding shares of Stock, the Board may not (a) materially increase the
benefits accruing to Optionees under the Plan or make any "modifications" as
that team is defined under Section 424(h)(3) (or its successor) of the Code if
such increase in benefits or modifications would adversely affect (i) the
availability to the Plan of' the protections of Section 16(b) of the Securities
Exchange Act, if applicable to the Company, or (ii) the qualification of the
Plan or any Options for "incentive stock option" treatment under Section 422 of
the Code; (b) change the aggregate number of shares of Stock which may be issued
under Options pursuant to the provisions of the Plan; (c) reduce the option
price at which ISOs may be granted to an amount less than the fair market value
per share, or 110% of fair market value as the case may be, at the time the
Option is granted; or (d) change the class of persons eligible to receive ISOs.
Notwithstanding the preceding sentence, the Board shall in all events have the
power and authority to make such changes in the Plan and in the regulations and
administrative provisions hereunder or in any outstanding Option as, in the
opinion of counsel for the Company, may be necessary or appropriate from time to
time to enable any Option granted pursuant to the Plan to qualify as an ISO or
such other stock option as may be defined under the Code, as amended from time
to time, so as to receive preferential federal income tax treatment.  The
termination or any modification or amendment of the Plan shall not, without the
consent of an Optionee, affect his or her rights under an Option previously
granted to him or her.  With the consent of the Optionee affected, the Board may
amend outstanding option agreements in a manner not inconsistent with the Plan.

     19.  CERTAIN RIGHTS OF THE COMPANY

     Unless an Optionee's (Option Agreement specifically provides to the
contrary, or an Optionee has entered into an employment, stockholder or other
agreement with the Company which provides for the repurchase of options or stock
in the event such Optionee's employment or involvement with the Company
terminates, the provisions of this Section 19 shall apply to each Option granted
under the Plan and to the shares of Stock acquired on exercise thereof.

     (a) Voluntary or Involuntary Transfers of Stock.  Shares of Stock acquired
         -------------------------------------------                           
by an Optionee pursuant to the exercise of an Option or Options granted under
the Plan shall not be voluntarily transferred by the Optionee without the
written consent of the Board which consent may be withheld or conditioned as the
Board sees fit.  If such Stock is subject to an involuntary transfer, including
by reason of death, a divorce settlement or judicial proceeding, the Company
shall have the fight to repurchase all or any shares of such Stock (including
any Stock subsequently acquired by the Optionee upon exercise of an Option if
the Stock so acquired is subject to such involuntary transfer) at a price equal
to the Repurchase Price at the time of the involuntary transfer event.  The
Company may exercise its repurchase right no later than 180 days following the
later of (a) the date of such involuntary transfer of such shares of Stock, (b)
the date 

                                      10.
<PAGE>
 
of any such subsequent acquisition of Stock upon exercise of an Option
and (c) the Board of Directors receipt of written notice of the occurrence of
such transfer event.  Any such shares of Stock as to which the Company does not
exercise its repurchase rights within such period shall thereafter be flee of
the restrictions of this Section 19.

     Repurchase Price.  As used herein the term "Repurchase Price" shall mean
     ----------------                           ------------------           
the fair market value of a share of Stock as determined in good faith by a
majority of the disinterested members of the Board of Directors of the Company.
In making their determination of fair market value of a share of Stock the
Directors will not take into account that the Stock may be illiquid or may
constitute a minority interest in the Company.

     (b.) .Securities Laws: Transfers In Violation of Plan.  Notwithstanding any
           -----------------------------------------------                      
other provision of this Plan the Company may refuse to permit transfer of the
Offered Shares if in the opinion of.  its legal counsel such transfer would
violate securities laws or subject the Company to liability thereunder.  Any
sale, transfer, pledge or other disposition of shares of Stock which is not in
accordance with the provisions of this Section 19 shall be void and of no effect
and shall not be recognized by the Company.

     20.  EFFECTIVE DATE AND DURATION OF THE PLAN

     The Plan shall become effective and shall be deemed to have been adopted on
May 25, 1996 subject only to ratification by the holders of at least a majority
of the outstanding shares of Stock within twelve (12) months after such date.
Unless the Plan shall have terminated earlier, the Plan shall terminate on the
tenth (10th) anniversary of its effective date, and no Option shall be granted
pursuant to the Plan after the day preceding the tenth (10th) anniversary of its
effective date.


                                      11.

<PAGE>
                                                                    EXHIBIT 23.1
 
                        CONSENT OF INDEPENDENT AUDITORS



The Board of Directors
Siebel Systems, Inc.:

We consent to the use of our report incorporated herein by reference and to the 
reference to our firm under the heading "Experts" in the prospectus.


/s/KPMG Peat Marwick

San Jose, California
October 1, 1997


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