Exhibit 99.1

                                  CERTIFICATION

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. ss.1350, as
adopted), Robert A. Spinner, the Chief Executive Officer of Extensity, Inc. (the
"Company"),  and Benjamin  Netick,  the Vice  President of Financing  and Acting
Chief Financial Officer of the Company, each hereby certify that, to the best of
their knowledge:

1. The Company's  Quarterly  Report on Form 10-Q for the period ended  September
30, 2002, to which this Certification is attached as Exhibit 99.1 (the "Periodic
Report") fully complies with the  requirements of Section 13(a) or Section 15(d)
of the Securities Exchange Act of 1934, as amended; and

2. The  information  contained in the Periodic  Report fairly  presents,  in all
material  respects,  the  financial  condition  of the Company at the end of the
period  covered by the Periodic  Report and results of operations of the Company
for the period covered by the Periodic Report.

Dated: November 8, 2002

/s/ Robert A. Spinner                             /s/ Benjamin Netick
- ---------------------------                       --------------------------
Robert A. Spinner                                 Benjamin Netick
Chief Executive Officer                           Vice President and
                                                  Acting Chief Financial Officer

This  certification  accompanies  the Periodic Report pursuant to Section 906 of
the  Sarbanes-Oxley  Act of 2002 and shall not be deemed  "filed" by the Company
for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.