ATG Appoints Fumi Matsumoto as Chief Technology Officer; Long-Time ATG Veteran Takes New Role; Co-Founder Joe Chung to Remain Active on the Board of Directors.

Business/Technology Editors

CAMBRIDGE, Mass.--(BUSINESS WIRE)--Oct. 8, 2002

ATG (Art Technology Group, Inc., Nasdaq: ARTG), a leading developer of online CRM applications for commerce, portals, and relationship management, today announced the appointment of Fumi Matsumoto as CTO effective immediately. Joe Chung, co-founder and former CTO, will remain as a director of ATG.

"Fumi's solid leadership has been instrumental in helping to transition ATG into a leader in online CRM," said Paul Shorthose, CEO, president and chairman of the board, ATG. "With Fumi's guidance over the past year, we have reached several technology milestones including our multi-application server strategy and recently announced flagship ATG6, which integrates key publishing, search, integration and analytic capabilities."

For the past ten years, Matsumoto has worked alongside Chung and Chief Strategy Officer Jeet Singh and was a key contributor to making the organization one of the world's leading developers of online CRM applications. As CTO, Matsumoto will drive ATG's product vision in concert with an exceptional engineering organization and superior product marketing and management organization.

"As one of the founding members of ATG, Fumi really has helped define the company and grow the products to where they are today," said Joe Chung, director and former CTO of ATG. "From a technology standpoint, Fumi has the proven ability to deliver products with the necessary vision to help ATG grow."

About ATG

ATG (Art Technology Group, Inc.) is the 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, BMG Direct, Eastman Kodak, Ford Motor Credit, HSBC, J.Crew, Sun Microsystems, USDA, U.S. Army, Walgreen Company, and Wells Fargo. 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.

(c)2002 Art Technology Group, Inc. ATG, Art Technology Group, the Techmark and the ATG Logo are registered trademarks of Art Technology Group, Inc. All other trademarks are the property of their respective holders. NASDAQ:ARTG

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 its periodic reports and registration statements filed with the Securities and Exchange Commission. Specific risk factors related to this press release include the possibility that Mr. Matsumoto will not remain in his new position, that ATG6 will not be released, either in a timely manner or at all, and that Mr. Chung will not remain affiliated with ATG.