ATG Portal Customers Provide Demonstrable Benefits When Creating Online Self-Service Environments.

Business Editors

CAMBRIDGE, Mass.--(BUSINESS WIRE)--Oct. 3, 2003

On Demand Webcast Features ATG Portal Customers Demonstrating

Return on Investment with Industry Insight Provided by

Forrester Research 

ATG (Art Technology Group, Inc., Nasdaq: ARTG), a leading provider of innovative software applications for commerce and customer self-service, today announced that it has produced an on-demand Webcast featuring several companies offering real-world insight into building customer-facing portals.

Laura Ramos, director of research at Forrester Research, will moderate the panel, while executives from Bell Canada, Conseco and Meritage Technologies provide detailed information about how to implement a successful portal solution. During the Webcast, the panelists discuss how they have created online self-service environments that provide personalized customer service and reduce costs while delivering the following benefits:

-- In only three months' time, Conseco implemented and deployed

its agent portal. To date, 93 percent of Conseco's independent

agents are using the portal to conduct business more

effectively with their customers.

-- A hospital client of Meritage Technologies has deployed a

portal to satisfy different constituent groups and has seen a

30 percent increase in referrals as well as improved overall

claims and insurance processing.

-- Through an ASP model, Bell Canada provides communities in

Canada with the opportunity to rapidly launch full-service,

community-customized e-Government sites, providing cost

savings to the communities.

What:  "Building Successful Customer-facing Portals"
Who:   Laura Ramos, director of research, Forrester;
       Kevin Hesler, vice president, IT, Conseco;
       Huw Morgan, senior director, Bell Canada;
       Steven Warshawsky, portal practice director, Meritage
            Technologies
When:  Available on demand beginning October 3, 2003
Where: Available at www.atg.com/portalwebcast

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 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.

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.

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 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 business generally may be found in 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 synopsis above may not fully or accurately describe the content of the webcast or that webcast does not occur. ATG undertakes no obligation to update any of the forward-looking statements after the date of this press release.