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                                                                    EXHIBIT 99.2



                                             
CONTACTS:
Financial/Investor:          Media:
Bob Zwerneman                Marcy Theobald        Sandra Dunn
VP of Investor Relations     PR Manager            VP of Marketing
S1 Corporation               S1 Corporation        VerticalOne Corporation
404-812-6225                 404-812-6254          678-443-7913
rzwernem@s1.com              mtheobal@s1.com       sdunn@verticalone.com


                      S1 CORPORATION COMPLETES ACQUISITION

                           OF VERTICALONE CORPORATION

    -- S1 ADDS ANOTHER MAJOR MILESTONE IN EXECUTING ON ITS VISION TO
    EMPOWER

    FINANCIAL INSTITUTIONS TO IMPROVE THEIR CUSTOMERS' WORLD --

ATLANTA - NOVEMBER 11, 1999 -- S1 Corporation (NASDAQ:SONE) today announced that
it has completed its acquisition of Atlanta-based VerticalOne Corporation.
VerticalOne becomes a wholly-owned subsidiary of S1 Corporation and will
maintain its corporate identity as a leading consolidator, organizer and
presenter of personal account information via the Internet. With the completion
of this strategic acquisition, S1 Corporation continues to aggressively execute
on its commitment to provide innovative solutions that help financial
institutions deliver greater value to their customers and ultimately improve
their customers' worlds.

     Under the terms of the agreement entered into on September 23, 1999, S1
Corporation issued approximately 3.86 million shares of S1 common stock to
VerticalOne shareholders. S1 also assumed options to purchase VerticalOne common
stock, which converted into options to purchase approximately 500 thousand
shares of S1 common stock and granted approximately 2 million additional options
to VerticalOne employees.


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     "By joining forces with VerticalOne, S1 is uniquely positioned to enable
financial institutions to develop lasting, personal relationships with their
customers," said James S. Mahan III, CEO of S1 Corporation. "We are extremely
pleased to welcome the exceptional people of VerticalOne into the S1 family. S1
solutions will now be extended to enable financial institutions, for the first
time, to provide customers with a single, online view of all their personal and
financial data, regardless of the source of the account. Ultimately, this
capability will empower financial institutions to provide such a compelling and
personalized online experience that ordinary customers will inevitably become a
loyal community of return visitors."

     In addition to applying its technology in support of financial services
solutions, VerticalOne will aggressively target and penetrate additional market
segments to capitalize on significant demand and market opportunity.
VerticalOne's strong relationships with leading Internet-based companies will be
maintained and expanded.

     VerticalOne's distribution partners include GO Network, LookSmart, MyWay
(formerly Planet Direct), The Motley Fool, The Street.com, AnyDay.com, and
BellSouth(R) Buzz(sm), and are also accessible via the Palm VII(TM) organizer,
the first handheld solution for out-of-the-box wireless Internet access. Through
these partnerships, and others, VerticalOne's reach will extend to over 40
million Internet users, giving them one-stop access to all of their personal
accounts online.

          ABOUT S1 CORPORATION

     S1 (NASDAQ:SONE), the pioneer of Internet banking, is today's leading
provider of innovative Internet-based financial services solutions. S1 offers a
broad range of applications that empower financial organizations to increase
revenue, strengthen customer relationships and gain competitive advantage by
meeting the evolving needs of their customers across various lines of business,
market segments


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and delivery channels. Through its professional services organization, S1's
applications can be implemented in-house or outsourced to the S1 Data Center.
Additional information about S1 is available at http://www.s1.com.

                          ABOUT VERTICALONE CORPORATION

     Headquartered in Atlanta, VerticalOne Corporation is a privately held
company founded in 1998 to enable the next generation of Internet content
personalization services for consumers. VerticalOne has built the information
infrastructure that will empower Internet destination sites to offer their
online customers a single point-of-access to a wide variety of personal content
and account information including reward programs, communications, investments,
bank statements, and other bills or personal accounts. VerticalOne's Privacy
Statement is certified by both TRUSTe(sm) and BBBOnLine(R), and the company is
certified by Internet Security Systems (ISS).

More information about the company can be obtained from the World Wide Web at
http://www.verticalone.com or by email to marketing@verticalone.com.

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