1 Exhibit 99.1 REPORT OF INDEPENDENT ACCOUNTANTS ON FINANCIAL STATEMENT SCHEDULE To the Board of Directors of Allaire Corporation Our audits of the consolidated financial statements referred to in our report dated March 13, 2000 appearing in the 1999 Annual Report to Shareholders of Allaire Corporation which report and consolidated financial statements are incorporated by reference in this Annual Report on Form 10-K also included an audit of the financial statement schedule listed in Item 14(a)(2) of this Form 10-K. In our opinion, this financial statement schedule presents fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. /s/ PricewaterhouseCoopers LLP Boston, Massachusetts March 13, 2000