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                                                                     EXHIBIT 5.1

         GUNDERSON DETTMER STOUGH VILLENEUVE FRANKLIN & HACHIGIAN, LLP
                             155 CONSTITUTION DRIVE
                          MENLO PARK, CALIFORNIA 94025




                                  July 8, 1999


Cybergold, Inc.
2921 Adeline St.
Berkeley, California 94703

               Re: Registration Statement on Form S-1

Ladies and Gentlemen:

               We have examined the Registration Statement on Form S-1 (File No.
333-79067) originally filed by Cybergold, Inc. (the "Company") with the
Securities and Exchange Commission (the "Commission") on May 21, 1999, as
thereafter amended or supplemented (the "Registration Statement"), in connection
with the registration under the Securities Act of 1933, as amended, of up to
4,000,000 shares of the Company's Common Stock (the "Shares"). The Shares, which
include an over-allotment option granted by certain stockholders of the Company
to the Underwriters to purchase up to 600,000 additional shares of the Company's
Common Stock, are to be sold to the Underwriters by the Company as described in
the Registration Statement for resale to the public. As your counsel in
connection with this transaction, we have examined the proceedings taken and are
familiar with the proceedings proposed to be taken by you in connection with the
sale and issuance of the Shares.

               It is our opinion that, upon completion of the proceedings being
taken or contemplated by us, as your counsel, to be taken prior to the issuance
of the Shares being sold by the Company and upon completion of the proceedings
being taken in order to permit such transactions to be carried out in accordance
with the securities laws of the various states where required, the Shares being
sold by the Company, when issued and sold in the manner described in the
Registration Statement and in accordance with the resolutions adopted by the
Board of Directors of the Company, will be legally and validly issued, fully
paid and non-assessable.

               We consent to the use of this opinion as an exhibit to said
Registration Statement and further consent to the use of our name wherever
appearing in said Registration Statement, including the prospectus constituting
a part thereof, and in any amendment or supplement thereto.

               Very truly yours,

               /s/ GUNDERSON DETTMER STOUGH VILLENEUVE FRANKLIN & HACHIGIAN, LLP

               Gunderson Dettmer Stough
               Villeneuve Franklin & Hachigian, LLP