About ATG

A trusted, global specialist in e-commerce, ATG (Art Technology Group, Inc., NASDAQ: ARTG) has spent the last decade focused on helping the world's premier brands maximize the success of their online businesses. The ATG Commerce application suite is the top-rated platform by industry analysts for powering highly personalized, efficient and effective e-commerce sites. The company's platform-neutral e-commerce optimization services can be easily added to any Web site to increase conversions and reduce abandonment. These services include ATG Recommendations and eStara Connections. The company is headquartered in Cambridge, Massachusetts, with additional locations throughout North America and Europe For more information, please visit http://www.atg.com.

(C) 2008 Art Technology Group, Inc. 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.

SOURCE: Art Technology Group, Inc.

Art Technology Group, Inc. 
Kimberly Maxwell, 617-386-1006 
Director, Investor Relations 
kmaxwell@atg.com

According to the California Association of Realtors, 67 percent of Internet homebuyers selected their agent because he or she was the first or most responsive agent to answer their questions. Using Instant Response powered by eStara Click to Call, real estate professionals can respond instantly to questions from visitors browsing their websites or property listings. Simply clicking a button initiates an instant, toll-free voice session to connect online visitors to real estate professionals.

eStara's Click to Call enables buyers and sellers browsing online to get instant answer to their real estate questions. Reporting features provide agents with instant reports to track and evaluate online leads generated through Click to Call. Instant Response buttons powered by eStara can be placed on property listings, display ads, agent websites, emails, and more.

Homes.com print introduces eStara Call Tracking

Homes.com print now offers eStara Call Tracking to directly measure the impact of its print publications. Driven by proven VoIP (Voice over Internet Protocol) infrastructure, eStara Call Tracking services enable Homes.com subscribers to accurately track every inbound telephone response and unify online and offline marketing efforts.

eStara Call Tracking offers much more insight on callers than traditional call measurement tools. Features include dynamic call routing, which ensures local advertisers get local leads by geo-targeting inbound calls.

"Homes.com Print subscribers are using eStara Call Tracking to track performance for themselves and their clients," said Ernie Blood, Homes.com Vice President and General Manager. "Now our subscribers can accurately measure the response to their Homes.com magazine listings."

AgentAdvantage and Homes.com will be exhibiting Click to Call services at the NAR 2008 REALTORS(R) Conference & Expo in Orlando, November 7-10 with Dominion Enterprises real estate businesses Advanced Access, eNeighborhoods and Number1Expert in booth #2841.

"During these tough economic times, particularly felt in the housing sector, realtors are looking to technology for an edge in the market. eStara Click to Call allows real estate agents to quickly engage with online home seekers, capturing their attention at peak interest and turning them into clients via a seamless, cross-channel experience," said Ryan Hoppe, marketing director for ATG's e-Commerce Optimization Services. "At the same time, eStara Call Tracking helps advertisers track the results of their print campaigns. By adopting both of these services, Homes.com and AgentAdvantage offer subscribers a powerful way to create closer, more personal relationships that result in more satisfied, loyal clients for real estate professionals."

eStara Connections -- including eStara Click to Call and eStara Call Tracking -- are part of ATG's e-Commerce Optimization Services product line, which quickly and dramatically lift online revenue for any Web site. eStara Connections includes additional services that help online media properties drive ad revenue including eStara Save & Send and eStara Form To Phone.

About Dominion Enterprises

Dominion Enterprises, a division of Landmark Communications, is a leading marketing services company serving the automotive, real estate, apartment, recruitment and marine markets. The company operates a variety of businesses that offer Internet marketing, Web site design and hosting, lead generation, CRM, and data capture and distribution services. The company has more than 40 market-leading Web sites reaching more than 12.5 million unique monthly visitors, and more than 500 magazines with a weekly circulation of over 5 million. Headquartered in Norfolk, Va., the company has nearly 6,000 employees nationwide and annualized revenue of more than $946 million. For more information, visit http://www.DominionEnterprises.com.

About ATG

A trusted, global specialist in e-commerce, ATG (Art Technology Group, Inc., NASDAQ: ARTG) has spent the last decade focused on helping the world's premier brands maximize the success of their online businesses. The ATG Commerce application suite is the top-rated platform by industry analysts for powering highly personalized, efficient and effective e-commerce sites. The company's platform-neutral e-commerce optimization services can be easily added to any Web site to increase conversions and reduce abandonment. These services include ATG Recommendations and eStara Connections. The company is headquartered in Cambridge, Massachusetts, with additional locations throughout North America and Europe. For more information, please visit http://www.atg.com.

(C) 2008 Art Technology Group, Inc. ATG and Art Technology Group are registered trademarks, and ATG Wisdom is a trademark 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 its periodic reports and registration statements filed with the Securities and Exchange Commission at www.sec.gov. 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 will not increase customer revenue across brands; that those customers leveraging ATG will not have the opportunity to increase revenue and decrease future costs; the need to adapt to rapid changes so products do not become obsolete; the possibility of errors in ATG's software products; the possibility that the solution will not make customer implementations faster or more flexible or permit the customer to meet its customer-facing or infrastructure requirements; that the ATG product will not continue to be integrated with third party applications servers or will not support all Web services enabled systems; that ATG's product strategy may change in the future; and the risks and costs of intellectual property litigation. ATG undertakes no obligation to update any of the forward-looking statements after the date of this press release.

SOURCE: Art Technology Group, Inc.

ATG 
Tucker Walsh, 617-386-1159 
twalsh@atg.com 
http://www.atg.com 
or 
Matter Communications 
Charna Cummings, 978-499-9250 x 222 
atg@matternow.com 
http://www.matternow.com

Expected next investor conference call information:
Conference Call Date: 10/28/2008
Conference Call Time: 10:00 AM
Conference Call URL: http://phx.corporate-ir.net/phoenix.zhtml?c=82997&p=IROL-Guestbook&UniqueId=1988943&mp=irol-eventDetails&mpdp=EventId~1988943!WebCastId~800781!StreamId~1195453&pp=IROL-EnhancedWebCast&ppdp=EventId~1988943!WebCastId~800781!StreamId~1195453&pph=540&ppw=788&rdu=&rdt=&upv=2