Exhibit 23.01 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 (File nos. 333-87516, 333-82252, 333-72518, 333-57672, 333-40456, 333-31484, 333-78087, 333-51945, 333-40645 and 333-38363) and on Form S-3 (No. 333-108068, 333-112091 and 333-36170) of Concord Communications, Inc. of our report dated January 19, 2004 relating to the financial statements, which appears in this Form 10-K. /s/ PricewaterhouseCoopers LLP Boston, Massachusetts March 15, 2004