Exhibit 99.1

         CALLIDUS SOFTWARE APPOINTS MICHELE PATTON TO BOARD OF DIRECTORS

       ACCOMPLISHED HUMAN RESOURCES EXECUTIVE WITH EXTENSIVE EXPERIENCE IN
                       COMPENSATION TO EXPAND BOARD DEPTH

    SAN JOSE, Calif., Sept. 12 /PRNewswire-FirstCall/ -- Callidus Software
Inc. (Nasdaq: CALD), a leader in Enterprise Incentive Management (EIM), today
announced the appointment of Michele Patton to its Board of Directors.  Ms.
Patton was most recently vice president, global centers of expertise at Sun
Microsystems. Prior to this she held senior HR and compensation posts at
StorageTek, EDS and JP Morgan. Ms. Patton has more than 20 years of hands-on
experience choosing, implementing and managing a wide variety of human
resources products and services including compensation programs and
information systems.  She will join the Board of Directors as an independent
director and serve on the Compensation and Nominating and Corporate Governance
Committees.  Ms. Patton holds a Bachelor of Arts in East Asian
Studies/Economics from Wesleyan University.

    The Company also announced the resignation of Terry Opdendyk from the Board
of Directors after years of dedicated service as a director. Mr. Opdendyk is the
founder of Onset Ventures, which made the initial investment in Callidus more
than eight years ago.

    "Michele brings the voice of our customers right into the board room. Her
vast knowledge of corporate compensation issues and programs, as well as her
broad understanding of the decision-making processes used to evaluate and select
information solutions at multi-national corporations gives her a unique
perspective on the EIM market," stated Mike Braun, chairman of the Board of
Callidus Software. "We are very excited to have her join the Board."

    "I am honored to be joining Callidus Software. The company has a wonderful
reputation with its customers and is a clear market leader. Bringing a voice
like mine to the board speaks volumes about the dedication and vision of this
team," said Ms. Patton. "I look forward to using my knowledge and experience to
help Callidus grow."

    "Given that Terry's business is early stage investing it is understandable
and appropriate for him to cycle off our board at this time," Braun continued.
"His commitment and tireless efforts on behalf of the company have been
fantastic. On behalf of the entire Board of Directors and company, I want to
extend our thanks and appreciation."

    "All of us at Onset Ventures are proud of Callidus," said Mr. Opdendyk.
"Building a market leader is no easy task, and the people of Callidus have done
it! And I am delighted to have Robert Youngjohns, a great business leader and
manager, join the Callidus team in helping the company realize its potential. My
long association with Callidus has been a terrific experience, and I thank
everyone for that opportunity."

    About Callidus Software

    Founded in 1996, Callidus Software Inc. (www.callidussoftware.com) is a
leading enterprise incentive management (EIM) provider to global companies
across multiple industries. Callidus Software's EIM systems allow enterprises to
develop and manage incentive compensation linked to the achievement of strategic
business objectives. Through its TrueComp Grid architecture, Callidus Software
delivers the industry's only EIM solution that combines the power and
scalability of grid computing with the flexibility of rules-based interface.
Customers/partners include AOL Time Warner Corporation, AT&T Wireless, BMC
Software, CUNA Mutual, Dun & Bradstreet, IBM, SBC Communications and Sun
Microsystems. Callidus Software is publicly traded on the NASDAQ under the
symbol CALD.

    NOTE: Callidus Software, the Callidus Software logo, TrueComp, TrueComp
Grid, TrueInformation, and TrueResolution are trademarks of Callidus Software
Inc. All other trademarks are the property of their respective owners.

SOURCE  Callidus Software
    -0-                             09/12/2005
    /CONTACT:  Jock Breitwieser of Callidus Software Inc., +1-408-975-6683, or
pr@callidussoftware.com/
    /Web site:  http://www.callidussoftware.com /

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