<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM ALLAIRE
CORPORATION FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               MAR-31-1999
<CASH>                                          54,407
<SECURITIES>                                         0
<RECEIVABLES>                                    3,866
<ALLOWANCES>                                     (532)
<INVENTORY>                                        104
<CURRENT-ASSETS>                                58,429
<PP&E>                                           7,576
<DEPRECIATION>                                 (2,724)
<TOTAL-ASSETS>                                  63,602
<CURRENT-LIABILITIES>                           19,012
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           232
<OTHER-SE>                                      43,369
<TOTAL-LIABILITY-AND-EQUITY>                    63,602
<SALES>                                          6,963
<TOTAL-REVENUES>                                 8,697
<CGS>                                              456
<TOTAL-COSTS>                                    1,962
<OTHER-EXPENSES>                                 9,637
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                (2,616)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                            (2,616)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (2,616)
<EPS-BASIC>                                     (0.14)
<EPS-DILUTED>                                   (0.14)