1 EXHIBIT 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-95683) and Form S-8 (No. 333-76855, 333-78329, 333-81729, 333-83617) of Allaire Corporation of our report dated March 13, 2000 relating to the financial statements, which appears in the Annual Report to Shareholders, which is incorporated in this Annual Report on Form 10-K. We also consent to the incorporation by reference of our report dated March 13, 2000 relating to the financial statement schedules, which appears in this Form 10-K. /s/ PricewaterhouseCoopers LLP Boston, Massachusetts March 29, 2000