EXHIBIT 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated March 31, 2005, relating to the consolidated financial statements, which appears in Critical Path, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2004. We also consent to the reference to us under the heading “Experts” in such Registration Statement.
/s/ PRICEWATERHOUSECOOPERS LLP
San Jose, California
April 5, 2005