ATG Clients Dominate Industry Awards for Customer-Centered Leadership

ATG technology powers several service and support operations recognized by the SSPA and Fast Company

CAMBRIDGE, Mass., November 8, 2005 - ATG (Art Technology Group, Inc., NASDAQ: ARTG), the software provider behind the most consistent and relevant marketing, commerce, and customer service experiences, today announced that several of its clients have received industry recognition for outstanding customer-centric operations. ATG software has empowered these companies to provide customers with exceptional experiences, leading to acknowledgement from influential industry organizations, including the annual Service & Support Professionals Association (SSPA) STAR Awards for Service Excellence and Fast Company magazine's Customers First Awards. Both sets of awards recognize innovation and advancement in the delivery of world-class customer service.

At the recent 2005 SSPA bi-annual member conference, ATG customers either received, or were finalists for, STAR Awards across a variety of categories. These include:

Sage Software - Timberland Office: STAR Award for High Case Volume - Awarded for service excellence at Sage's support center where support representatives field thousands of customer assistance/support requests per day. Sage employs ATG Knowledge, ATG's industry-leading knowledge management platform, to provide its support representatives with a unified console that delivers precise and accurate answers from structured and unstructured content, enabling Sage to increase its productivity and, when necessary, to deflect live interaction to lower cost channels.
RSA Security: STAR Award for Complex Support Applications - Awarded for delivery of sophisticated technical support for complex applications in mixed or otherwise complex environments. To achieve this level of support, RSA Security utilizes ATG Knowledge, the industry-leading knowledge management platform for call center-assisted customer service.

And finally, ATG customer EMC Corp. earned a STAR Award for Mission Critical Support.

The October 2005 issue of Fast Company includes the publication's annual Customers First Awards which recognize customer-focused companies and include categories such as " Leading Listeners, companies that use feedback to make things better; the Customer-Centered Leaders, who create a culture that's dedicated to service; the Profitable Players, who know that investments in service really pay off; the High-Tech Achievers, companies that use technology not just to replace the human element but to improve the experience; and the Employee Innovators, who understand the inextricable link between good employees and happy customers."

Several ATG customers received these awards, including:

Cabela's (Leading Listener Award) - The World's Foremost Outfitter of hunting, fishing and outdoor gear through mail order catalogs, retail stores and the Internet, Cabela's strategy is to create the largest body of sporting knowledge anywhere on the Web and to personalize and deliver this information in a way that adds value for customers. To achieve this goal, Cabela's uses the ATG Customer Experience Platform because of its out-of-the-box personalization and customer self-service capabilities, which help customers to quickly meet their objectives online.
USAA (Employee Innovator Award) - With a large contingent of its employee base comprised of service professionals, USAA, one of the country's foremost financial-services firms, was recognized for granting its employees the freedom and flexibility to make decisions that are truly in the best interests of their customers. ATG assists USAA service representatives through the use of the ATG Service Suite.

Other ATG customers who received recognition from Fast Company include Intuit and Best Buy.

"We would like to congratulate the multiple ATG customers that have recently received recognition within the industry for their leadership roles in the areas of customer service and support," said Cliff Conneighton, senior vice president of marketing, ATG. "ATG firmly believes that customers should demand better experiences from the organizations they do business with, and our company's strategic vision and technologies are focused on enabling our clients to provide the most relevant and consistent customer experiences possible. These awards provide validation that a complete customer-centric approach, combined with the capabilities of ATG solutions, can result in service success that truly differentiates companies from competitors."

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'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 forward- looking 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 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; and 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. ATG undertakes no obligation to update any of the forward-looking statements after the date of this press release.

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Tucker Walsh
ATG
+1.617.386.1159
twalsh@atg.com