World's Largest and Most Profitable Companies Use Ariba for Spend Management

Business Wire, May 22, 2008

18 of 20 Largest and 16 of 20 Most Profitable Firms in Recently Released Fortune 500 Leverage Ariba Solutions to Drive Cost and Competitive Advantage

SUNNYVALE, Calif. -- When it comes to spend management, premier global companies rely on Ariba, Inc. (Nasdaq:ARBA), the leading spend management solutions provider, to drive their goals. Of the companies ranked on the latest Fortune 500 list published by Fortune Magazine (www.fortune.com), 18 of the 20 largest based on revenue use Ariba's offerings to lower costs, increase profits and gain competitive advantage. They are joined by 16 of the 20 most profitable companies, including AT&T, Hewlett-Packard, J.P. Morgan Chase & Co., and Pfizer Inc., among others.

"In a global economic climate in which so many factors can't be controlled, companies must take aggressive steps to manage costs where they can to mitigate negative impacts on their business," said Bob Calderoni, Chairman and Chief Executive Officer, Ariba. "At Ariba, we are focused on providing solutions that help companies do just this and we are pleased that more than half of the world's premier companies as ranked by Fortune are leveraging them to maintain and even enhance their advantage."

In addition to the largest and most profitable companies on the Fortune 500 list, leading companies across a range of industries are also using Ariba's solutions to drive bottom line results and fuel business transformation, including:

* Five of the top 10 electronics companies

* Five of the top 10 aerospace and defense firms

* Seven of the top 10 pharmaceutical companies

* Six of the top 10 automakers and OEMs

* Six of the top 10 specialty retailers and

* Five of the top 10 chemical manufacturers

A unique combination of technology, category expertise and services delivered in a single, integrated platform, Ariba's spend management solutions enable companies to manage their spend from end-to-end - from sourcing and orders through invoice and payment. Delivered on-demand, the solutions require no investment in special hardware or lengthy implementations and provide low cost integration with ERP systems, allowing companies of all sizes to accelerate and increase returns on their investments.

To learn more about Ariba[R] Spend Management[TM] solutions and the results they are generating for companies around the world, visit: www.ariba.com

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[TM] software and services. Ariba can be contacted in the U.S. at 1.650.390.1000 or at www.ariba.com.

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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 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, including Procuri which Ariba acquired on December 17, 2007; 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. Factors and risks associated with its business, including a number of the factors and risks described above, are discussed in Ariba's Form 10-Q filed with the SEC on May 7, 2008.