<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-31-2000
<PERIOD-END>                               MAR-31-2000
<CASH>                                          43,459
<SECURITIES>                                    89,357
<RECEIVABLES>                                   15,366
<ALLOWANCES>                                     (983)
<INVENTORY>                                        318
<CURRENT-ASSETS>                               148,566
<PP&E>                                          11,420
<DEPRECIATION>                                 (5,796)
<TOTAL-ASSETS>                                 161,160
<CURRENT-LIABILITIES>                           42,666
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           270
<OTHER-SE>                                     117,881
<TOTAL-LIABILITY-AND-EQUITY>                   161,160
<SALES>                                         22,480
<TOTAL-REVENUES>                                26,619
<CGS>                                            1,225
<TOTAL-COSTS>                                    4,779
<OTHER-EXPENSES>                                22,128
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  41
<INCOME-PRETAX>                                  1,321
<INCOME-TAX>                                       330
<INCOME-CONTINUING>                                991
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       991
<EPS-BASIC>                                       0.04
<EPS-DILUTED>                                     0.03