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  Kenneth R. Hahn,  the 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 June 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: August 14, 2002

/s/ Robert A. Spinner                            /s/ Kenneth R. Hahn
- -----------------------                          -----------------------
Robert A. Spinner                                Kenneth R. Hahn
Chief Executive Officer                          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.