Ariba Chief Financial Officer to Present at RBC Capital Markets Conference; Webcast Available Wednesday, August 3, 2005

Business Wire, August 2, 2005

SUNNYVALE, Calif. -- Ariba(R), Inc. (Nasdaq:ARBA), the leading Spend Management solutions provider, today announced that Jim Frankola, chief financial officer, Ariba, will present at the RBC Capital Markets North American Technology Conference on Wednesday, August 3, 2005. The conference will take place at the Four Seasons Hotel in San Francisco.

A live webcast of the presentation will be available from 1:00-1:25 p.m. ET/10:00-10:25 a.m. PT. To access the webcast, please visit the investor relations section of our website at www.ariba.com, or join the conference online at www.wsw.com/webcast/rbc32/arbad.> About Ariba, Inc.

Ariba, Inc. is the leading provider of Spend Management solutions to help companies realize rapid and sustainable bottom line results. Successful companies around the world in every industry use Ariba Spend Management software and services. Ariba can be contacted in the U.S. at 650-390-1000 or at www.ariba.com.

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Ariba and the Ariba logo are registered trademarks of Ariba, Inc. Ariba Spend Management, Ariba Spend Management. Find it. Get it. Keep it., Ariba. This is Spend Management, Ariba Solutions Delivery, Ariba Analysis, Ariba Buyer, Ariba Category Management, Ariba Category Procurement, Ariba Contract Compliance, Ariba Contracts, Ariba Contract Management, Ariba Contract Workbench, Ariba Data Enrichment, Ariba eForms, Ariba Sourcing, Ariba Invoice, Ariba Travel & Expense, Ariba Workforce, Ariba Supplier Network, Ariba Supplier Performance Management, Ariba PunchOut, Ariba QuickSource, PO-Flip, Ariba Settlement and Ariba Spend Management Knowledge Base are trademarks or service marks of Ariba, Inc. Ariba Proprietary and Confidential. All rights reserved. Patents pending. All other trademarks are property of their respective owners.

Ariba Safe Harbor

Safe Harbor Statement under the Private Securities Litigation Reform Act 1995: Information and announcements in this release involve Ariba's expectations, beliefs, hopes, plans, intentions or strategies regarding the future and are forward-looking statements that involve risks and uncertainties. All forward-looking statements included in this release are based upon information available to Ariba as of the date of the release, and we assume no obligation to update any such forward-looking statements. These statements are not guarantees of future performance and actual results could differ materially from our current expectations. Factors that could cause or contribute to Ariba's operating and financial results to differ materially from its current expectations include, but are not limited to: delays in development or shipment of new versions of Ariba's products and services; lack of market acceptance of Ariba's existing or future products or services; inability to continue to develop competitive new products and services on a timely basis; introduction of new products or services by major competitors; the ability to attract and retain qualified employees; difficulties in assimilating acquired companies; long and unpredictable sales cycles and the deferrals of anticipated orders; declining economic conditions; inability to control costs; changes in the company's pricing or compensation policies; significant fluctuations in our stock price; the outcome of and costs associated with pending or potential future regulatory or legal proceedings; the impact of our acquisitions, including the disruption or loss of customer, business partner, supplier or employee relationships; and the level of costs and expenses incurred by Ariba as a result of such transactions. For example, Ariba recently settled patent infringement filed against it by ePlus, Inc. for $37.0 million and incurred significant related legal expenses. Factors and risks associated with its business, including a number of the factors and risks described above, are discussed in Ariba's Form 10-K filed December 14, 2004, in its Form 10-Q filed February 9, 2005, and in its Form 10-Q filed May 10, 2005.