Ariba Earns Additional WebTrust Seal.

SUNNYVALE, Calif. -- Ariba, Inc. (Nasdaq:ARBA):

--Company Receives Certification for Third-Party Verification of Security, Availability, Processing Integrity and Confidentiality of Its On-Demand Sourcing Applications in Addition to the Ariba Supplier Network

Ariba(R), Inc. (Nasdaq:ARBA), the leading spend management solutions provider, today announced that it has received an updated WebTrust Seal of Assurance for Security, Availability, Processing Integrity and Confidentiality. The seal was issued following a thorough, independent examination by global professional services firm KPMG, and covers the Ariba Supplier Network(TM), Ariba Sourcing(TM) and Ariba Analysis(TM). Ariba received its first WebTrust seal in 2001.

"With millions of dollars in business conducted on our platform each day, it is critical that we maintain the highest levels of availability and security," said Dan Grillo, Director of Hosting Services, Ariba. "Receiving the WebTrust seal for both the Ariba Supplier Network and our sourcing applications validates our commitment to providing customers with quality solutions they can trust on a round-the-clock basis, and is a testament to the deep competency of our global operations team."

A joint effort of the American Institute of Certified Public Accountants (AICPA) and the Canadian Institute of Chartered Accountants (CICA), the WebTrust program provides a set of globally recognized standards designed to address consumer and business concerns over the privacy and security of information exchanged online. To earn a WebTrust seal, e-commerce providers must demonstrate that their systems are protected from unauthorized access and use, are available as intended, process transactions and data as intended and maintain the confidentiality of member data and information.

There are more than 120,000 registered suppliers on the Ariba Supplier Network, where they are able to conduct business with their trading partners. In addition, hundreds of companies leverage Ariba's sourcing applications to effectively manage their spend.

"As the number of companies conducting business online grows, it is imperative that solution providers take aggressive measures to protect the privacy and security of customer and corporate data," said Tim Minahan, Chief Services Officer at Aberdeen Group, the leading provider of fact-based research and advice for the global technology-driven value chain. "In maintaining its WebTrust seal for the Ariba Supplier Network, Ariba has demonstrated its continued compliance with a globally recognized set of industry standards and diligence in maintaining effective controls. In addition, in earning certification for its on-demand sourcing solutions, the company is leading the way in the development of best practices related to the secure delivery of software as a service."

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.

Copyright (C) 1996 - 2006 Ariba, Inc.

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. 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 February 8, 2006.