PRESS RELEASE

Nucleus Research Examines the Real ROI from ATG

May 5, 2003

53 Percent of Reference Customers Fail to Receive Positive Return, According to Nucleus Research Study

Customers may experience initial benefits, but many deployments hindered by inexperienced consultants and poorly defined business objectives

Nucleus Research (NucleusResearch.com), the leading provider of bottom-line focused technology research, today announced the results of an independent study of Art Technology Group (ATG, Nasdaq: ARTG). Fifty-three percent of ATG customers interviewed did not believe that they had achieved a positive return on investment (ROI) from their deployment of ATG’s e-commerce platform. Despite some early benefits gained from implementing the platform, overwhelming consulting costs and challenges, coupled with a lack of clear business objectives for using the platform, prevented many companies from achieving payback from their investment.