ATG Unveils ATG Wisdom(TM): Putting Enterprise and Customer Knowledge to Work for Richer, Higher-Value, Customer Interactions; At DEMOfall 2005, Company Launches Strategy to Enable Enterprises to Derive Higher Value Throughout the Customer Lifecycle.

HUNTINGTON BEACH, Calif. -- ATG (Art Technology Group, NASDAQ: ARTG), the software provider behind the most consistent and relevant marketing, commerce, and customer service experiences, today announced ATG Wisdom(TM), the company's strategy for enabling customer-conscious enterprises to create more relevant, compelling, consistent, and profitable customer interactions, seamlessly across communications channels and throughout the marketing, sales, and service lifecycle.

Already endorsed by world-class enterprises and validated by leading industry analysts, the ATG Wisdom strategy offers an alternative to the traditional silo-based approach to sales, marketing and service/support offered by many vendors. Whether an interaction takes the form of a request for information, service, or support, an online transaction, or an outbound campaign, ATG's holistic approach to guiding customer interactions enables organizations to deliver the right mix of information at the right time, using the preferred communications channel.

"At Symantec, we pride ourselves on our technology innovation and non-traditional strategic thinking, and we seek the same approach from the companies with whom we partner and work," said Tim Crowder, senior manager, Global Support Strategy, Symantec. "ATG has a strong, long-standing reputation in the commerce and service and support arenas, and its expertise has resulted in a truly unique strategy in Wisdom. It matches our vision exactly. Our customers expect us to deliver the most intelligent and effective service and support possible and Wisdom will enable us to take advantage of customer data in ways never before possible. The result is a more rewarding experience for our customers, which will ultimately drive our business forward and differentiate us from our competitors."

As opposed to the rigid, inflexible applications typified by solutions that can actually inhibit a satisfying and profitable customer experience, the ATG Wisdom strategy evolves from the understanding that customers do not always behave or interact in the way businesses prefer. Rather, customers define the kinds of paths they take with an organization, and they expect that organization to accommodate them.

The solutions enabled by the ATG Wisdom strategy uniquely add value for businesses by empowering companies to choreograph interactions in a way that immediately recognizes and appeals to their most valuable customers. The strategy promotes the need for an aggregated view of the customer information used by front-line applications. But unlike the "data warehouse" approach typified by CRM initiatives, the aggregated view provided by ATG's Wisdom-enabled technology is designed for real-time, operational use -- where the information can be used by any customer-facing application that needs it, be it a Web site, a customer agent, a voice-enabled IVR application, an ATM, or a retail point of sale device. As a result, businesses can present consistent customer data, a consistent approach to segmentation, and a consistent approach to marketing, sales, and service. Such a goal can only be achieved by a vendor that offers proven scalability for hundreds of thousands of simultaneously "connected" customers.

Consisting of a series of technology enablers incorporated into the ATG family of products, together with best practices from ATG and its partners, ATG's Wisdom-enabled technology will give companies complete, contextualized insight into their customers' history, activities, and preferences across the full enterprise, making each interaction more informed, efficient, and mutually rewarding.

ATG is uniquely qualified to introduce the groundbreaking Wisdom strategy, based on a 10-year track record developing award-winning, best-of-breed offerings in service/support, commerce, and marketing.

"To truly advance customer experience and drive higher profit and value into the next generation, companies will not only need to consider new technologies, they'll also need to align their overall strategy to embrace a more holistic approach," said Cliff Conneighton, senior vice president of marketing, ATG. "With this focus in mind, we've developed the ATG Wisdom strategy to reintroduce the 'personal touch' into every customer experience. By tailoring every interaction to the customer's own context, from prior purchases and service history to personal preferences, ATG's Wisdom-enabled solutions will let companies deploy relevant and effective strategies to better serve their customers and drive their own business results."

About ATG

ATG (Art Technology Group, Inc., NASDAQ: ARTG) makes the software that the world's most customer-conscious companies use to create a more relevant and consistent customer experience, throughout the marketing, commerce, and service lifecycle, and across the Web, e-mail, call center, and mobile channels. Offering an alternative to the traditional silo-based approach to customer-facing applications, ATG Wisdom(TM) is the company's strategy for delivering a seamless, more compelling, and mutually valuable experience to each customer and segment. The company fulfills this strategy by providing fully integrated best-of-breed product suites installed on-premise or delivered on-demand. ATG's solutions power over 600 major brands, including A&E Networks, Airbus, American Airlines, American Eagle Outfitters, Best Buy, Boeing, Cingular Wireless, DirecTV, France Telecom, Friends Provident, Hewlett-Packard, Hotels.com, Hyatt Hotels, HSBC, InterContinental Hotels Group, Kingfisher, Louis Vuitton, Merrill Lynch, Neiman Marcus, Philips, Procter & Gamble, Symantec, T-Mobile, Target, USAA, US Army, US Navy, Warner Music, 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 www.atg.com.

(C) 2005 Art Technology Group, Inc. ATG and Art Technology Group are registered trademarks and ATG Wisdom is a trademark 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 ATG's 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 handle user volumes; 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 customer will not close additional business due to the implementation of the ATG product; 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; 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.