<PAGE>
Exhibit 5.1
[LETTERHEAD OF WILSON SONSINI GOODRICH & ROSATI]
August 16, 2000
InfoSpace, Inc.
601 108th Avenue N.E., Suite 1200
Bellevue, Washington 98004
RE: REGISTRATION STATEMENT ON FORM S-4
Ladies and Gentlemen:
We have examined the Registration Statement on Form S-4 to be filed by
InfoSpace, Inc. (the "Company") with the Securities and Exchange Commission on
August 16, 2000 (the "Registration Statement") in connection with the
registration under the Securities Act of 1933, as amended, of 82,679,191 shares
of the Company's Common Stock (the "Shares"). As your counsel in connection with
this transaction, we have examined the proceedings taken and are familiar with
the proceedings proposed to be taken by you in connection with the sale and
issuance of the Shares.
It is our opinion that the Shares will be, as or when issued and sold in
the manner described in the Registration Statement and in accordance with the
resolutions of the Company's Board of Directors, and upon completion of the
proceedings being taken in order to permit such transactions to be carried out
in accordance with the securities laws of the various states where required,
legally and validly issued. It is our further opinion, subject to the
assumptions set forth in the preceding sentence, that the Shares will be fully
paid and nonassessable.
We consent to the use of this opinion as an exhibit to the Registration
Statement, and further consent to the use of our name wherever appearing in the
Registration Statement, including the joint proxy statement/prospectus
constituting a part thereof, and any amendment thereto.
Sincerely,
WILSON SONSINI GOODRICH & ROSATI
Professional Corporation
