EXHIBIT 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Prospectus constituting part of this Registration Statement on Form S-8 of our report dated February 3, 1999 appearing on page 25 of Allaire Corporation's Annual Report on Form 10-K for the year ended December 31, 1998. /s/ PricewaterhouseCoopers LLP PricewaterhouseCoopers LLP Boston, Massachusetts June 28, 1999