ADVISORY/ATG, Forrester Research, and Critical Mass Present 'Delivering ROI Through Optimized Brand Experiences' in Atlanta.

Business Editors/High-Tech Writers

ADVISORY...for Thursday (June 19)

CAMBRIDGE, Mass.--(BUSINESS WIRE)--June 17, 2003

Event Showcases ATG Customers Who Have Leveraged the Online Channel to Create Engaging Brand Experiences that Promote Growth While Fostering Loyalty

Showcasing leading organizations maximizing IT investments while effectively meeting the needs of customers, ATG (Art Technology Group, Inc., Nasdaq: ARTG), Forrester Research, and Critical Mass will host "Delivering ROI through Optimized Brand Experiences" on Thursday, June 19 at The Crown Plaza Ravinia in Atlanta. The event will provide case studies of organizations that are leveraging ATG technology to create a brand experience through the online channel that promotes corporate growth and strengthens customer loyalty.

Presentations will examine how InterContinental Hotels has more than doubled its online loyalty program enrollment; how Proctor & Gamble is saving nearly $70 million in research costs; and how Mercedes-Benz is cost-effectively driving tens of thousands of qualified leads into dealerships every year.

What: Delivering ROI through Optimized Brand Experiences

When: Thursday, June 19, 2003, 8:30 a.m. - 11:00 a.m. EDT 

Where: The Crown Plaza Ravinia, 4355 Ashford-Dunwoody Rd., Atlanta

To Register: visit www.atg.com/deliveringroi or 1.800.RING.ATG ext. 23456

About ATG

ATG (Art Technology Group, Inc.) is a leading provider of innovative software applications for commerce and customer self-service. 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.

ATG has delivered e-business solutions to blue-chip companies worldwide including Aetna Services, Inc., Alcatel, American Airlines, Barclays Global Investors, Best Buy, BMG Direct, Eastman Kodak, Ford Motor Credit, HSBC, J. Crew, Sun Microsystems, 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) 2003. 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 those customers leveraging ATG will not necessarily have the opportunity to increase revenue and decrease future costs of customer maintenance; 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.