ATG Celebrates Milestone in Search Technology; Over 100 Million Answers Served in First Five Years of Natural Language Processing Search Technology

Business Wire, June 7, 2005

CAMBRIDGE, Mass. -- ATG (Art Technology Group, NASDAQ: ARTG) the software provider behind the most consistent and relevant marketing, commerce, and service experiences, today announced that a significant milestone has been reached with ATG search, the industry's longest established and leading natural language processing search engine that forms the basis for ATG Self-Service. At its five-year anniversary, ATG search has now served over 100 million answers to customers of ATG clients including Cingular/AT&T Wireless, Altera, EMC, Boeing, and many more.

"While our competitors focus their efforts on essentially playing "catch up" with the natural language processing capabilities that we have had for years, we continue to enhance and refine the single most robust search engine targeted at service resolution," said Cliff Conneighton, senior vice president of marketing, ATG. "With ATG search, our clients' customers and employees are able to find targeted, relevant information in the way that is most natural and intuitive to them."

ATG search is unique and innovative because ATG is still the only NLP (natural language processing) search provider that is able to treat all content the same - simply as information - and return the most specific, relevant result. ATG search directs users to the information they need - regardless of format, location or language. In side-by-side testing with other leading search engines, ATG search delivered the "best available answer" over 90 percent of the time, compared with 50 percent for the closest competitor.(1)

ATG search offers one of the industry's most comprehensive solutions including a complete search framework, intuitive and flexible navigation, automatic content categorization, multi-tiered indexing of all types of content, extensive natural language processing, and high performance and proven scalability.

"ATG provides an exceedingly strong and complete framework for search," continued Conneighton. "Various competitors may claim features such as categorization, language processing, structured content, and guided navigation as singular points of differentiation, but only ATG combines all of these features into a single, robust search platform."

Further, unlike competitors who utilize NLP search technology from other vendors in the form of an OEM relationship, ATG created its own NLP search technology. There is intrinsic value in owning this technology outright as ATG is able to make dynamic upgrades and modifications to the solutions based on market needs more quickly than via OEM relationships.

Finally, ATG's search strategy is unique in that it can often act as the point of entry for the creation of a rich and compelling experience across the customer lifecycle of marketing, commerce, and service. With ATG search as a foundation, companies can create a complete and unified experience for their customers by capturing information at the point of interaction across any channel. In essence, beyond improving customer satisfaction with a more precise, personalized search experience, users can leverage ATG Self-Service as they look to identify and take advantage of up-sell/cross-sell opportunities on their Web sites and gain actionable insight into customer interests. Further, for internal purposes, users can automatically organize and classify vast quantities of electronic documents, and more easily find and reuse corporate documents regardless of format, language, or location.

(1) Independent testing by Cap Gemini Ernst and Young, 2003.

About ATG

ATG (Art Technology Group, Inc., NASDAQ: ARTG) makes the software that the world's largest and most prestigious companies use to create a relevant and consistent customer experience, across the Web, e-mail, call center, and mobile channels; and throughout the marketing, commerce, and service lifecycle. With ATG, world-class enterprises create and manage highly targeted online commerce and marketing campaigns, as well as loyalty-driving and cost effective knowledge management, customer service, and support initiatives. ATG's solutions power brands including A&E Networks, Airbus, American Airlines, American Eagle Outfitters, AT&T Wireless, Best Buy, Boeing, France Telecom, Friends Provident, General Electric, Hewlett-Packard, HSBC, InterContinental Hotels Group, Kingfisher, Merrill Lynch, Neiman Marcus, Philips, Procter & Gamble, SBC, T-Mobile, Target, US Army, US Federal Aviation Administration, Warner Music, Wells Fargo, and Yahoo! The company is headquartered in Cambridge, Massachusetts, with additional locations throughout North America, Europe, and Asia. For more information about ATG, please visit www.atg.com.

(C) 2005 Art Technology Group, Inc. ATG and Art Technology Group are registered trademarks of Art Technology Group, Inc. 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, on time or significantly enhance the user's Internet experience or will not increase customer revenue across brands; that those customers leveraging ATG won't have the opportunity to increase revenue and decrease future costs; the need to adapt to rapid changes so products do not become obsolete; the possibility of errors in ATG's software products; the possibility that the solution will not make customer implementations faster or more flexible or permit the customer to meet its customer-facing or infrastructure requirements; that the ATG product will not continue to be integrated with third party applications servers or will not support all Web services enabled systems; that ATG's product strategy may change in the future; the possibility that the press release does not accurately reflect the competitive landscape of the software industry or the functionality of the software; 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.