ADVISORY/ATG Presents: 'Maximizing Sales, Service, & Marketing Online'; Gartner's Walter Janowski Joins ATG in Discussing Impact of Personalization Technology.

Business/Technology Editors

ADVISORY...for Tuesday, Sept. 24

CAMBRIDGE, Mass.--(BUSINESS WIRE)--Sept. 24, 2002

ATG (Art Technology Group, Inc., Nasdaq: ARTG), a leading developer of online CRM applications that deliver an integrated, personalized experience for customers, partners and employees: the frontline of every business, will host an online CRM forum entitled "Maximizing Sales, Service, & Marketing Online." This four-city tour, which begins today in Redwood City, CA, with additional stops in Los Angeles, New York, and Dearborn, MI, will feature interactive discussions focused on how companies can best leverage personalization technology to increase sales, improve marketing effectiveness and strengthen customer relationships.

Each of the sessions includes a presentation on online CRM by Walter Janowski, research director at Gartner. Janowski is one of the industry's leading analysts covering CRM and eCRM. His presentation will address key issues relating to the management of customer interactions and multiple e-channel initiatives. Also presenting will be Ken Lownie, vice president of professional services for ATG. Lownie will highlight examples of how ATG customers are successfully reducing costs, increasing sales, and significantly improving their customer service capabilities as a result of deploying the company's commerce and portal solutions.

Each of the four programs also features a roundtable discussion between ATG customers, as well as a demonstration of ATG6, the latest version of the company's commerce and portal solutions.

      What:             ATG presents "Maximizing Sales, Service, &
                        Marketing Online" featuring Ken Lownie,
                        vice president of professional services,
                        ATG and Walter Janowski, research director,
                        Gartner.

      To register:
      http://www.atg.com/en/pages/forms/020801atg6usevents.jhtml

      Location:         Redwood City, CA
      When:             Tuesday, September 24, 2002 at 8:30 a.m. PDT
      Where:            Hotel Sofitel
                        223 Twin Dolphin Drive

      Location:         Los Angeles, CA
      When:             Thursday, September 26, 2002 at 8:30 a.m. PDT
      Where:            The Westin Bonaventure Hotel and Suites
                        404 South Figueroa Street

      Location:         New York, NY
      When:             Tuesday, October 8, 2002 at 8:30 a.m. EDT
      Where:            The New York Helmsley Hotel
                        212 East 42nd Street

      Location:         Dearborn, MI
      When:             Thursday, October 10, 2002 at 8:30 a.m. CDT
      Where:            Automotive Hall of Fame
                        21400 Oakwood Boulevard

About ATG

ATG (Art Technology Group, Inc.) is a leading developer of online CRM applications that deliver an integrated, personalized experience for customers, partners and employees: the frontline of every business. 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 solutions for commerce, portals, and relationship management are ideal for integrated e-business initiatives across the enterprise.

Today, ATG has delivered solutions to blue-chip companies worldwide, including Aetna Services, Inc., Alcatel, American Airlines, AT&T, Barclays Global Investors, Best Buy, BMG Direct, Eastman Kodak, Ford Motor Credit, HSBC, J. Crew, Sun Microsystems, Walgreen Company, and WellsFargo and government organizations including the United States Army and the USDA. 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) 2002 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. 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; or increase user sales or marketing effectiveness; the need to adapt to rapid changes so products do not become obsolete; the possibility of errors in ATG's software products; and the possibility that the solution will not make customer implementations faster or more flexible; and the possibility that ATG will discontinue certain offerings, risks and costs associated with intellectual property litigation. ATG undertakes no obligation to update any of the forward-looking statements after the date of this press release.