<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S FINANCIAL STATEMENTS FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1999
AND IS QUALIFIED IN ITS ENTIRELY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

<S>                             <C>                     <C>
<PERIOD-TYPE>                   9-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1999             DEC-31-1998
<PERIOD-START>                             JAN-01-1999             JAN-01-1998
<PERIOD-END>                               SEP-30-1999             SEP-30-1998
<CASH>                                          62,913                  17,745
<SECURITIES>                                     7,603                   1,005
<RECEIVABLES>                                    1,281                     445
<ALLOWANCES>                                       156                     206
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                                72,558                  19,325
<PP&E>                                           5,572                   1,482
<DEPRECIATION>                                   1,252                     416
<TOTAL-ASSETS>                                  76,995                  20,445
<CURRENT-LIABILITIES>                            6,503                   2,300
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                  29,801
<PREFERRED>                                          0                       0
<COMMON>                                            19                       4
<OTHER-SE>                                      68,938                 (11,943)
<TOTAL-LIABILITY-AND-EQUITY>                    76,995                  20,445
<SALES>                                          1,129                     808
<TOTAL-REVENUES>                                 3,061                   1,727
<CGS>                                              156                     175
<TOTAL-COSTS>                                      873                     345
<OTHER-EXPENSES>                                19,209                   7,379
<LOSS-PROVISION>                                    33                     180
<INTEREST-EXPENSE>                                 138                     101
<INCOME-PRETAX>                                (16,035)                 (5,946)
<INCOME-TAX>                                         0                       0
<INCOME-CONTINUING>                            (16,035)                 (5,946)
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                   (16,035)                 (5,946)
<EPS-BASIC>                                      (2.07)                  (2.67)
<EPS-DILUTED>                                    (2.07)                  (2.67)


</TABLE>