Exhibit 32.2

                           PERSISTENCE SOFTWARE, INC.

                            CERTIFICATION PRUSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


In connection with the Quarterly Report of Persistence Software, Inc. (the
"Company") on Form 10-QSB for the quarter ended March 31, 2004, as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), I,
Brian Tobin, Acting Chief Financial Officer of the Company, certify, pursuant to
18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley
Act of 2002, that:

(1)      The Report fully complies with the requirements of Section 13(a) or
         15(d) of the Securities Exchange Act of 1934; and

(2)      The information contained in the Report fairly presents, in all
         material respects, the financial condition and result of operations of
         the Company.


/s/ BRIAN TOBIN
---------------
Brian Tobin
Acting Chief Financial Officer
May 14, 2004