Fortune 1000 Organizations Achieve Significant ROI from ATG Deployments

Guide to E-Commerce Technology

- Increased Sales and Productivity and Lowered Development Costs Key Factors in Successes-

CAMBRIDGE, Mass., May 5, 2003 - As IT budgets shrink and executives demand that investments show positive return quickly, ATG (Art Technology Group, Inc., Nasdaq: ARTG), a leading provider of innovative software applications for commerce and customer self-service, today announced that its customers are continuing to yield several positive results and return on their investments in ATG`s technology.

Consumer-facing organizations across a number of markets have leveraged ATG`s Commerce, Relationship Management and Personalization solutions to: increase online sales, seamlessly integrate the various channels of their business, improve highly-personalized self-service functionality on their Web sites and provide organizations with a 360 degree view of their customers.

-- Newell Rubbermaid, a Fortune 500 global marketer and manufacturer of consumer products and the parent company of brands such as: SharpieŽ, Paper MateŽ and GracoŽ, has credited ATG Commerce with helping the organization improve online service and reduce development costs by approximately 75 percent. ATG enabled Newell Rubbermaid to consolidate its 30-50 independently managed Web sites, but still maintain a unique look and feel for each brand. The single platform allows each uniquely-branded site to share technical resources and underlying functionality. Aberdeen Group recently named Newell Rubbermaid`s deployment of ATG as a "Top 10 Significant CRM Implementation in 2003."

-- Martha Stewart Omnimedia (MSO) increased online holiday sales by 20 percent over the previous year after deploying its new site on ATG Commerce. Through the integration of its core channels (online, catalog and television) MSO immediately recognized increased revenue through higher conversion rates with segmented campaigns to target customers with personalized promotions, real-time online promotions and the conversion of content only customers into paying customers.

-- The U.S. Army has increased the number of registered users on its Army Knowledge Online (AKO) portal by more than 450 percent, increasing the number of registered users to 1.2 million, since deploying on ATG`s portal technology. Now, individuals from the Army are able to access their email account, personnel information and additional applications through a single interface. Previously, users had to deal with an overabundance of links and disconnected processes and databases of information, causing an overall loss in productivity.

-- Hyatt Hotels has increased registration on its site by 20 percent by deploying ATG`s Relationship Management platform and Scenario Personalization. ATG enabled Hyatt to unify its 121 property sites onto a single platform, www.hyatt.com , and deliver highly-specific promotions and offers to customers based on their user behavior and guest profile. Now, visitors to hyatt.com are 30 percent more likely to complete the reservation process online.

-- Hooked on Phonics realized a 225 percent increase in online memberships and increased sales revenues by 38 percent after launching its site on ATG Commerce. ATG worked with Hooked on Phonics to revamp its static Web site to mimic the "emotional" selling tactics that were successful in its offline channels and provide Hooked on Phonics with the data pertaining to where site visitors were coming from and what influenced their buying decisions.

"Our customer ROI numbers speak for themselves," said John Dragoon senior vice president of product management and marketing. "ATG has proven time and again that Fortune 1000 organizations are seeing measurable results from deploying our technology. Moving forward, we continue to work with our customers to assure them that we are meeting their needs from both a business and technological perspective."

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 .