<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
SEPTEMBER 30, 2000 CYBERSOURCE CORPORATION FORM 10-Q AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<CASH> 45,024
<SECURITIES> 65,526
<RECEIVABLES> 8,615
<ALLOWANCES> (1,265)
<INVENTORY> 0
<CURRENT-ASSETS> 1,249
<PP&E> 27,490
<DEPRECIATION> (7,118)
<TOTAL-ASSETS> 289,778
<CURRENT-LIABILITIES> 15,209
<BONDS> 0
0
0
<COMMON> 34
<OTHER-SE> 274,411
<TOTAL-LIABILITY-AND-EQUITY> 289,778
<SALES> 0
<TOTAL-REVENUES> 7,760
<CGS> 5,751
<TOTAL-COSTS> 30,765
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 22
<INCOME-PRETAX> (27,009)
<INCOME-TAX> 0
<INCOME-CONTINUING> (27,009)
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> (27,009)
<EPS-BASIC> (0.99)
<EPS-DILUTED> 0.00
</TABLE>