Ariba Customers Outperform Peers in Spend Management; Companies Using Ariba Solutions Lead the Way in Cost Reduction, Compliance and Spend Under Management According to New Research from Aberdeen Group.

SUNNYVALE, Calif. -- Enterprises today are using e-procurement to manage more requisitions, spend categories and suppliers than ever before. And the results of a new research brief from independent research firm Aberdeen Group indicate that those leveraging the integrated offerings of Ariba(R), Inc. (Nasdaq:ARBA), the leading spend management solutions provider, reap significantly higher rewards.

According to "E-Procurement Beyond the Hype: Companies Increase Spend Under Management, Reduce Costs with E-Procurement Systems," companies using Ariba solutions to manage their procurement are "outperforming their peers in multiple areas," leading the way when it comes to cost reduction, compliance and spend under management.

In evaluating companies that have implemented e-procurement systems based on total spend under management, suppliers enabled, user adoption and reduction in unapproved or "maverick" spending, Aberdeen found that Ariba customers:

--Reduced off-contract spending by an average of 34 percent, compared to 21 percent for all other respondents.

--Increased spend under management by 30 percent, compared to 8 percent for all other respondents.

--Manage 46 percent of their total indirect materials spend through their e-procurement system as compared to 35 percent for all other respondents.

"We are proud to report this benchmark of Aberdeen clients using Ariba spend management solutions," stated Sudy Bharadwaj, vice president of Aberdeen Group. "Aberdeen's fact-based research does show where Ariba has excelled in delivering spend management results."

"The more spend a company can control, the greater the results they can achieve," said Lou Unkeless, chief marketing officer, Ariba. "Ariba's spend management solutions are uniquely designed to provide the technology, commodity expertise and services needed to bring more spend under management. And as the Aberdeen report demonstrates, companies of all sizes across all industries are using them successfully to accelerate their bottom-line results and achieve excellence."

For more information on Ariba's solutions and the value they can deliver, please visit our website at www.ariba.com. To access the Aberdeen E-Procurement Benchmark, "E-Procurement Beyond the Hype: Companies Increase Spend Under Management, Reduce Costs with E-Procurement Systems," visit: http://www.ariba.com/learningcenter/view_page.cfm?asset_id=291

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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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. 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 7, 2005 and in its Form 10-Q filed May 15, 2006.