EXHIBIT 23.1 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in this Registration Statement of Persistence Software, Inc. and its subsidiaries (the "COMPANY") on Form S-3 of our reports dated January 24, 2003 (and March 20, 2003 as to Note 11) appearing in the Company's Annual Report on Form 10-K for the year ended December 31, 2002 and to the reference to us under the heading "Experts" in the prospectus, which is part of this Registration Statement. /S/ DELOITTE & TOUCHE LLP ------------------------- San Jose, California April 30, 2003