ATG And TIBCO Software Form Strategic Alliance to Deliver Enterprise Integration Capabilities for ATG Dynamo Suite.

Business/Technology Editors

NEW ORLEANS--(BUSINESS WIRE)--April 19, 2001

Integration of ATG Dynamo and TIBCO Facilitates Unified Customer

Management Solutions

ATG (Art Technology Group, Inc., NASDAQ:ARTG), a provider of customer management and e-commerce applications, today announced a global alliance with TIBCO Software Inc. (NASDAQ:TIBX) to extend the reach of the ATG Dynamo(R)e-Business Platform.

The alliance demonstrates strong commitment from both companies to develop, market, and sell enterprise application integration (EAI) products to customers looking for more efficient ways to deliver unified customer management solutions. EAI supports consistent customer management strategies by connecting business systems, customer databases, and enterprise information across all departmental functions and enterprise boundaries - including wireless, PDA and Web - to provide a single view of customers. By reducing the time and expenses required to integrate information and business processes between enterprise systems, ATG customers will increase profitability and improve efficiency across their organizations.

As part of the alliance, ATG and TIBCO(TM) also will engage in global joint sales, marketing, and technology initiatives. ATG will license TIBCO technology as part of its ATG Dynamo EAI product offerings, enabling connectivity between ATG Dynamo and popular enterprise systems by vendors such as SAP, PeopleSoft, Siebel, and J.D. Edwards. The alliance also enhances ATG Dynamo's business-to-business (B2B) integration, enabling enterprises to interact with vendors, distributors, customers, and trading partners through popular B2B Internet standards, including RosettaNet, XML, and cXML.

"In today's competitive landscape, building and maintaining strong customer relationships is absolutely essential for survival," said Vivek Ranadive, chairman and CEO of TIBCO Software(TM). "ATG's leadership in providing highly-personalized, online customer relationship solutions, augmented by TIBCO's world-class integration solutions, will enable companies to automate business processes and operate more efficiently while developing and deepening the customer relationships that are crucial to any company's success."

"To maximize e-business investments, a company must select a platform that will adapt to existing infrastructure as well as technology innovations over time without costly, time consuming infrastructure overhauls," said Jeet Singh, CEO of ATG. "The alliance with TIBCO is a logical next step since ATG and TIBCO share the philosophy of delivering products that combine business value with the proven ability to build products that scale to customer needs. Customers can quickly connect their critical databases of customers, products, and transaction information and leverage them for their customer management and e-commerce activities."

In support of ATG's annual user conference, TIBCO will be a Gold sponsor, and chairman and CEO, Vivek Ranadive, will speak today at the ATG Open 2001 being held this week in New Orleans.

About TIBCO Software

TIBCO Software(TM) Inc. (NASDAQ: TIBX) is a leading provider of total business integration solutions--delivering infrastructure software that enables companies to seamlessly integrate business systems in real-time. TIBCO's products enable the real-time distribution of information through patented technology called The Information Bus(TM), or TIB(R). TIBCO technology was first used to digitize Wall Street and has since been adopted in diverse industries including financial services, telecommunications, electronic commerce, transportation, logistics, manufacturing and energy. TIBCO's global customer base includes more than 1,000 customers such as Cisco Systems, Yahoo!, Ariba, NEC, Enron, Sun Microsystems, GE Capital, Philips, AT&T, Pirelli and AOL/Netscape. Headquartered in Palo Alto, California, TIBCO can be reached at 650-846-1000 or on the web at www.tibco.com.

About ATG

ATG is a leading provider of customer management and e-commerce products and services. ATG offers an integrated suite of Java(TM) application server-based products and services, as well as related application development, integration and support services. The ATG Dynamo(R) e-Business Platform enables Global 2000 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.

With its network of more than 250 partners, ATG has delivered e-business solutions to over 670 companies worldwide including 3M, Aetna Services, Inc., American Airlines, Blockbuster, BMG Direct, eChips, Eastman Kodak, HSBC, Herman Miller, J. Crew and Sun Microsystems. The company is headquartered in Cambridge, Massachusetts with additional locations throughout North America, Europe, Asia and Australia. www.atg.com

TIBCO, TIBCO Software, TIBCO ActiveEnterprise, TIBCO ActiveExchange, TIBCO ActivePortal, TIBCO Extensibility, The Information Bus and TIB are trademarks or registered trademarks of TIBCO Software Inc.

(c)2001 Art Technology Group, Inc. ATG, Art Technology Group, the Techmark, the ATG Logo, and Dynamo are registered trademarks, and Personalization Server and Scenario Server are trademarks, of Art Technology Group, Inc. All other trademarks are the property of their respective holders. NASDAQ:ARTG

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 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 ATG software will not work effectively with TIBCO's products; that the ATG and TIBCO products will not remain compatible or facilitate the integration between the ATG Dynamo software and the products of other vendors; 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.