Art Technology Group Expands West Coast Headquarters With New San Francisco Location; New Facilities Support Growing Dynamo Customer and Partner Base in the Western United States.

Business/Technology Editors

CAMBRIDGE, Mass.--(BUSINESS WIRE)--Feb. 2, 2000

Art Technology Group, Inc. (&uot;ATG&uot;) (NASDAQ:ARTG) today announced the expansion of its West Coast headquarters. The new 13,000 square foot location at 100 Pine Street, 21st Floor, San Francisco, houses Dynamo(R) sales, services, support, training and engineering staff for ATG's growing customer and partner base in the western United States. The San Francisco location is the largest regional ATG office in the United States, second only in size to the Cambridge, Mass. corporate headquarters. During 1999 the West Coast headquarters experienced rapid growth, more than tripling its employee headcount from the previous year.

ATG has established strong relationships with Bay Area technology partners such as Interwoven, Inc., Active Software, Inc., Accrue Software, Inc., and the West Coast locations of nationally recognized systems integrators such as Scient, Fort Point Partners, Organic Online, and USWeb/CKS. These relationships have helped ATG secure and service many high-profile dot.com and traditional brick-and-mortar customers in the western United States. The new training and engineering center at the Pine Street location is aimed at elevating the education level of Dynamo partners.

&uot;The West Coast, and the Bay Area in particular, was an incredibly fruitful territory for ATG during 1999. Last year we secured many of the hottest online retailers as customers and Internet systems integrators as partners,&uot; said Jeet Singh, president and CEO of ATG. &uot;This year with our expanded San Francisco facilities, customers and partners alike will benefit from the enriched sales, services, support and training offered by our West Coast staff.&uot;

ATG clients already serviced from the San Francisco location include: AT& Broadband Services, Baby Center, Inc., Caresoft, Inc., Celestial Seasonings, Inc., Disney/ABC Video Productions, Inc., EDreams, eGreetings.com, Eve.com, Springstreet.com, Miller Freeman, Inc., Nickelodeon/Nvolve, Inc., Smith &Hawken, Tavolo.com, and Women.com Networks LLC.

About Art Technology Group

Art Technology Group, Inc. (&uot;ATG&uot;) (NASDAQ:ARTG) is a leading provider of Internet customer relationship management and electronic commerce products and services. ATG offers an integrated suite of Java application server-based products and services, as well as related application development, integration and support services. ATG's Dynamo(R) product suite enables Global 1000 enterprises, as well as new businesses using the Internet as their primary business channel, to understand, manage and build their online customer relationships and to more effectively market, sell and support their products and services over the Internet.

The Dynamo solution is designed to provide businesses with the core platform and software tools required to develop and deploy personalized, scalable and reliable e-commerce Web sites. Dynamo is licensed to over 200 customers including: 3M, BabyCenter, BellSouth, BMG Direct, Eastman Kodak, Informix, John Hancock Funds, Inc., Network Solutions, Newbridge Networks, Scudder Kemper Investments, Sun Microsystems and TheStreet.com. The Company is headquartered in Cambridge, MA with additional locations throughout the U.S. and in Europe.

Dynamo is a registered trademark of Art Technology Group.

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 ATG's prospectus and 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 San Francisco office site will not adequately serve the needs of ATG's customers; that the Company will not continue to grow enough to warrant the size of the office; and the inherent risks of natural disasters such as earthquakes associated with the San Francisco location. ATG undertakes no obligation to update any of the forward-looking statements after the date of this press release.