ATG ANNOUNCES GENERAL AVAILABILITY OF ATG 6

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"ATG has delivered a robust, fully integrated solution comprised of our unique Intelligent Data Operating Layer (IDOL) that integrates unstructured, semi-structured and structured information from multiple repositories through an understanding of the content," said Richard Gaunt, CTO and co-founder of Autonomy, Inc. "With the release of ATG 6 and the new ATG Search module, our joint enterprise customers will benefit from a fully integrated solution that will immediately leverage and complement the functionality of ATG Scenario Personalization and the ATG Portal and ATG Commerce applications."

ATG 6 includes:

* ATG Publishing

* New ATG Integrations for Siebel and Documentum as well as a new Integrations Framework and enhanced Tibco adapter

* ATG Search

* Significant updates to ATG Portal (including Microportals), ATG Commerce and ATG Relationship Management solutions

* Support for J2EE (Java 2, Enterprise Edition) version 1.3 in ATG Dynamo Application Server

ATG continues to enhance ATG 6. Future offerings will include ATG Analytics, which will be sold separately as an add-on product.

About ATG

ATG (Art Technology Group, Inc.) is a leading developer of online CRM applications that deliver an integrated, personalized experience for customers, partners and employees: the frontline of every business. Customers around the globe rely on ATG for the frontline applications that help build and manage mutually beneficial relationships. Deployed on the industry`s most popular application servers, ATG`s application suites for e-commerce, portals, and relationship management are ideal for integrated e-business initiatives across the enterprise.

Today, ATG has delivered e-business solutions to blue-chip companies worldwide including Aetna Services, Inc., Alcatel, American Airlines, Barclays Global Investors, Best Buy, BMG Direct, Eastman Kodak, Ford Motor Credit, HSBC, J. Crew, Sun Microsystems, Walgreen Company, and WellsFargo. The company is headquartered in Cambridge, Massachusetts, with additional locations throughout North America, Europe, and Asia. For more information about ATG, please visit our Web site at www.atg.com .

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* 2002 ATG and Art Technology Group are registered trademarks of Art Technology Group, Inc. Scenario Personalization is a trademark of ATG. All other product names, service marks, and trademarks mentioned herein are trademarks of their respective owners.

This press release contains forward-looking statements for purposes of the safe harbor provisions under The Private Securities Litigation Reform Act of 1995. These statements involve known and unknown risks and uncertainties that may cause ATG`s actual results, levels of activity, performance or achievements to be materially different from any future results, levels of activity, performance or achievements expressed or implied by such forward-looking statements. Important risk factors affecting ATG`s business generally may be found in their periodic reports and registration statements filed with the Securities and Exchange Commission at www.sec.gov. Risk factors related to the subject matter of this press release include the possibility that the ATG product deployment will not be successful or significantly enhance the user`s internet experience or handle user volumes or will not drive more revenue through the e-business channel, the need to adapt to rapid changes so products do not become obsolete; the possibility of errors in ATG`s software products; and the possibility that the solution will not make customer implementations faster and more flexible; the possibility that ATG`s product will not continue to support any application server and the risks and costs of intellectual property litigation. ATG undertakes no obligation to update any of the forward-looking statements after the date of this press release.