Computerworld Premier IT 100 Leaders Award Recognizes Newell Rubbermaid for IT Innovation - Solutions Provided by ATG Helps Newell Rubbermaid Win IT Leadership Honor.

CAMBRIDGE, Mass. -- ATG (Art Technology Group, Inc., Nasdaq: ARTG), the software provider behind the Web's richest customer experiences, today announced that Vince Vachio, director of e-business at Newell Rubbermaid, has been selected as Premier 100 IT Leader by IDG's Computerworld, the weekly newspaper for IT leaders. The award honors individuals who have creatively applied technology to execute their organization's business strategy.

The Premier 100 IT Leaders award, now entering its sixth year, recognizes the top 100 individuals for exceptional technology leadership, innovative approaches to business challenges as well as effective execution of comprehensive IT strategies. Vince will be honored at the Computerworld Premier 100 IT Leaders Conference May 9, 2005 in Scottsdale, Arizona.

Vachio led the technical implementation of Newell Rubbermaid's decision to build the company's web sites on ATG. This centralized technology approach complements the company's enterprise system strategy of providing consumers, customers, suppliers, and employees self-service access to a wide variety of information, as well as tremendous transactional and business process synergies.

"Maintaining between 30 and 40 consumer brand web sites for millions of visitors can be a daunting task, particularly for a company that grows through product innovation and brand marketing" said Vince Vachio, director of e-business at Newell Rubbermaid. "By centralizing each site on ATG technology, Newell Rubbermaid was able to create a single platform, single process and a single methodology from which each site could be quickly and easily developed, deployed and managed."

"ATG has helped Newell Rubbermaid create highly successful online channels for a significant large number of suppliers, customers and employees," said Cliff Conneighton, senior vice president of marketing, ATG. "Leveraging ATG's self-service capabilities, many of the company's employee-focused HR functions are accessible electronically via the Internet at home, the office and through kiosks within factory locations, providing easy access to information.

We're thrilled that Computerworld has recognized Vince and Newell Rubbermaid as a premier IT leader in the industry."

"The Premier 100 IT leaders for 2005 have shown that the loftiness of their aims stands to benefit us far more than the technologies they implement," said Don Tennant, editor-in-chief, Computerworld. "Our congratulations, and our gratitude, go out to our Premier 100 IT Leaders for 2005. Thanks for reminding us that a global oneness built on a spirit of servitude and an appreciation for our diversity will benefit us far more than technology ever will."

About ATG

ATG (Art Technology Group, Inc., NASDAQ: ARTG) delivers innovative software to help high-end consumer-facing companies create a richer, more adaptive interactive experience for their customers and partners online, via email and messaging, and through contact centers. ATG has delivered category-leading commerce, marketing and customer service solutions to hundreds of the world's best-known brands including American Eagle Outfitters, Best Buy, Kingfisher, Neiman Marcus, Target, Washington Mutual, Friends Provident, Merrill Lynch, Wells Fargo, HSBC, A&E Networks, Warner Music, AT&T Wireless, T-Mobile, SBC, Yahoo!, France Telecom, Airbus, GE, Boeing, Philips, Procter & Gamble, Hewlett-Packard, American Airlines, InterContinental Hotels Group, US Army, and US Federal Aviation Administration. 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 ATG's periodic reports and registration statements filed with the Securities and Exchange Commission. Risk factors related to the subject matter of this press release include the possibility that the company's product strategy may change; the customer's award may not be related to company products; other ATG customers may not qualify for awards; the need to adapt to rapid changes so products do not become obsolete; the possibility of errors in ATG's software products; non-responsiveness of the market to receipt of awards; the potential that the products will not deliver significant and definable business benefits to end users and the costs and risks associated with intellectual property infringement and litigation. ATG undertakes no obligation to update any of the forward-looking statements after the date of this press release.