<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>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                           3,247
<SECURITIES>                                       496
<RECEIVABLES>                                    3,698
<ALLOWANCES>                                     (502)
<INVENTORY>                                        141
<CURRENT-ASSETS>                                 8,033
<PP&E>                                           6,497
<DEPRECIATION>                                 (2,197)
<TOTAL-ASSETS>                                  12,708
<CURRENT-LIABILITIES>                           17,724
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                            49
<OTHER-SE>                                    (18,931)
<TOTAL-LIABILITY-AND-EQUITY>                    12,708
<SALES>                                          7,827
<TOTAL-REVENUES>                                 8,905
<CGS>                                              823
<TOTAL-COSTS>                                    2,425
<OTHER-EXPENSES>                                14,502
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                (7,886)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                            (7,886)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (7,886)
<EPS-BASIC>                                     (2.38)
<EPS-DILUTED>                                   (1.04)