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                                                                   EXHIBIT 10.04

                                    EXHIBIT F

                   SUPPLEMENT TO REGISTRATION RIGHTS AGREEMENT

    The Company and Vertex Technology Fund, Ltd entered into a Note Purchase
Agreement dated October 16, 1998 along with related documentation, including a
Registration Rights Agreement. In connection with the Preferred Stock and
Warrant Purchase Agreement (the "Agreement"), the parties agree to amend such
Registration Rights Agreement with respect to the parties to this Agreement as
follows:

- -   "Purchasers" shall mean collectively Investors, their assignees and
    transferees, and individually each Investor and any assignee or transferee
    of such Investor.

- -   "Registrable Securities" shall mean the Common Stock issuable upon
    conversion of the Shares or upon exercise of the Warrants subject to the
    same exclusions as set forth in Section 1.7 of the Registration Rights
    Agreement.

- -   "Registration Termination Date" shall mean with respect to any Registrable
    Securities the earliest of July 11, 2002 or the dates other than October 15,
    2001 identified in Section 1.9 of the Registration Rights Agreement.

All capitalized terms have the meanings ascribed to them in the Preferred Stock
and Warrant Purchase Agreement dated June 28, 1999, including the term
"Closing", unless otherwise specifically provided. The Registration Rights
Agreement is in all other respects affirmed.


VERSANT CORPORATION                                VERTEX TECHNOLOGY FUND, LTD

By:                                                By:
   -------------------------------                    --------------------------
Name:                                              Name:
     -----------------------------                     -------------------------
Title:                                             Title:
      ----------------------------                       -----------------------


ADDITIONAL INVESTOR                                 ADDITIONAL INVESTOR

By:                                                By:
   -------------------------------                    --------------------------
Name:                                              Name:
     -----------------------------                     -------------------------
Title:                                             Title:
      ----------------------------                       -----------------------

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ADDITIONAL INVESTOR                                 ADDITIONAL INVESTOR

By:                                                By:
   -------------------------------                    --------------------------
Name:                                              Name:
     -----------------------------                     -------------------------
Title:                                             Title:
      ----------------------------                       -----------------------

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