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                                                                     Exhibit 5.1


Infinity Financial Technology
July 23, 1996
Page 1


                                 July 23, 1996



Infinity Financial Technology, Inc.
640 Clyde Court
Mountain View, CA 94043


Ladies and Gentlemen:

                  At your request, we have examined the Registration Statement
on Form S-1 filed by Infinity Financial Technology, Inc., a California
corporation (the "Company"), with the Securities and Exchange Commission on July
23, 1996 (the "Registration Statement"), relating to the registration under the
Securities Act of 1933, as amended, of up to 2,702,500 shares of the Company's
common stock, no par value (the "Stock"), of which 2,000,000 shares of
authorized but unissued stock are to be offered and sold by the Company and up
to 702,500 shares of stock (including 352,500 shares subject to the
underwriters' over-allotment option) are to be offered and sold by certain
selling shareholders (the "Selling Shareholders").  The Stock is to be sold to
the underwriters named in the Registration Statement for resale to the public.

                  As counsel to the Company, we have examined the proceedings
taken by the Company in connection with the issuance and sale by the Company of
up to 2,702,500 shares of Stock.

                  We are of the opinion that (i) the shares of Stock to be
offered and sold by the Company have been duly authorized and, when issued and
sold by the Company 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 issued, fully paid and nonassessable, and (ii) the
shares of Stock to be offered and sold by the Selling Shareholders have been
duly authorized and legally issued and are fully paid and nonassessable.


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Infinity Financial Technology
July 23, 1996
Page 2

                  We consent to the use of this opinion as an exhibit to the
Registration Statement and further consent to all references to us in the
Registration Statement, the prospectus constituting a part thereof and any
amendments thereto.


                               Very truly yours,



                               MORRISON & FOERSTER LLP