<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED FINANCIAL STATEMENTS OF S1 CORPORATION FOR THE NINE MONTHS ENDED
SEPTEMBER 30, 2000 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
CONSOLIDATED FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               SEP-30-2000
<CASH>                                         197,895
<SECURITIES>                                    22,612
<RECEIVABLES>                                  104,251
<ALLOWANCES>                                   (8,512)
<INVENTORY>                                          0
<CURRENT-ASSETS>                               327,459
<PP&E>                                          90,351
<DEPRECIATION>                                (27,528)
<TOTAL-ASSETS>                               1,412,713
<CURRENT-LIABILITIES>                           93,820
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                    252,781
<COMMON>                                     1,596,113
<OTHER-SE>                                   (563,393)
<TOTAL-LIABILITY-AND-EQUITY>                 1,412,713
<SALES>                                              0
<TOTAL-REVENUES>                               173,832
<CGS>                                          101,396
<TOTAL-COSTS>                                  476,640
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              39,900
<INCOME-PRETAX>                              (364,304)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                          (364,304)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 (364,304)
<EPS-BASIC>                                     (6.83)
<EPS-DILUTED>                                   (6.83)