<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
<S> <C> <C> <C>
<PERIOD-TYPE> 12-MOS 12-MOS 3-MOS
<FISCAL-YEAR-END> DEC-31-1998 DEC-31-1999 MAR-31-2000
<PERIOD-START> JAN-01-1998 JAN-01-1999 JAN-01-2000
<PERIOD-END> DEC-31-1998 DEC-31-1999 MAR-31-2000
<CASH> 11,188 21,735 27,718
<SECURITIES> 0 0 0
<RECEIVABLES> 617 2,288 2,911
<ALLOWANCES> 75 110 150
<INVENTORY> 0 0 0
<CURRENT-ASSETS> 11,799 24,574 31,248
<PP&E> 1,836 5,195 8,156
<DEPRECIATION> 140 772 1,223
<TOTAL-ASSETS> 13,626 31,363 49,416
<CURRENT-LIABILITIES> 1,536 2,933 4,232
<BONDS> 0 0 0
21,701 53,371 69,748
4 4 4
<COMMON> 24 26 28
<OTHER-SE> (9,741) (25,547) (25,170)
<TOTAL-LIABILITY-AND-EQUITY> 13,626 31,363 49,416
<SALES> 980 4,100 1,865
<TOTAL-REVENUES> 980 4,100 1,865
<CGS> 1,776 4,785 2,149
<TOTAL-COSTS> 1,776 4,785 2,149
<OTHER-EXPENSES> 6,290 15,062 10,431
<LOSS-PROVISION> 0 0 0
<INTEREST-EXPENSE> 176 9 2
<INCOME-PRETAX> (7,075) (14,804) (10,308)
<INCOME-TAX> 0 0 0
<INCOME-CONTINUING> (7,075) (14,804) (10,308)
<DISCONTINUED> 0 0 0
<EXTRAORDINARY> 0 0 0
<CHANGES> 0 0 0
<NET-INCOME> (7,075) (14,804) (10,308)
<EPS-BASIC> (3.31) (8.80) (4.34)
<EPS-DILUTED> (3.31) (8.80) (4.34)
</TABLE>