ATG Fourth-Quarter and Year-End 2002 Conference Call to Be Broadcast Live over the Internet on January 23, 2003.

Business Editors/High-Tech Writers

CAMBRIDGE, Mass.--(BUSINESS WIRE)--Jan. 13, 2003

In conjunction with its regularly scheduled fourth-quarter and year-end financial results news release, ATG (Art Technology Group, Inc.; Nasdaq: ARTG) plans to host its quarterly conference call for investors at 5:00 p.m. ET on Thursday, January 23, 2003. The call will be broadcast live over the Internet. Investors interested in listening to the Webcast should log onto the "Investor Relations" section of ATG's Web site, located at www.atg.com, at least 15 minutes prior to the event's broadcast.

About ATG

ATG (Art Technology Group, Inc.) is a leading developer of online marketing, sales, and service solutions for global consumer-facing organizations. Customers around the globe rely on ATG for frontline applications that enhance and improve the entire customer lifecycle experience. Deployed on the industry's most popular application servers, ATG's application suites for e-commerce, portals, and relationship management are ideal for integrating online initiatives across the enterprise.

Today, ATG has delivered online solutions to blue-chip companies worldwide including Aetna Services, Alcatel, American Airlines, Barclays Global Investors, Best Buy, BMG Direct, Eastman Kodak, Ford Motor Credit, HSBC, J.Crew, Sun Microsystems, Walgreens, and WellsFargo. 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.