ATG Expands Operations and Executive Team to Support Extraordinary Growth Worldwide.

Business/Technology Editors

CAMBRIDGE, Mass.--(BUSINESS WIRE)--Feb. 1, 2001

Ten Years of Customer-Centric Innovation and Development

Provide Solid Foundation for Regional and Operational Expansion

ATG (Art Technology Group, Inc., Nasdaq: ARTG), a leading provider of customer relationship management and e-commerce solutions, today announced the milestone of 1,000 worldwide employees, the opening of offices in Tokyo, Japan and Asia-Pacific headquarters in Sydney, Australia, and the appointment of four executives to the ATG management team. The operational expansion sustains the company's momentum as ATG celebrates ten years of technology and services innovation.

In recent months, ATG reached the milestone of more than 1,000 employees who lend their technical and operational expertise to ensure all ATG clients maximize the value of their e-businesses initiatives. As ATG grows in number, the company also continues its global expansion with entry into the Asia-Pacific region. With offices in Tokyo, Singapore, Hong Kong and Sydney, ATG is positioned to meet the e-business needs of new and existing customers in regions of the world expected to contribute greatly to the company's growth in the coming years.

"By providing unparalleled technology and services, ATG has grown in both size and reputation during the past ten years," said Paul Shorthose, president and chief operating officer at ATG. "The addition of more than 75 years of executive experience to our sales, services, corporate, and technical support organizations will help sustain our extraordinary growth across the globe in the years to come."

To support the company's operational objectives and growth in 2001 and beyond, ATG recently appointed four new members to its executive team from blue chip companies like IBM and Oracle. New members of the ATG executive team include:

--  Bernard Bailey, senior vice president of global services, leads
    the development and implementation of ATG client services. Prior
    to joining ATG, Bailey was an executive at IBM where he was
    employed for 16 years in a variety of finance, sales, and
    operations positions. Most recently, he served as the chief
    operations officer within the business innovation services public
    sector group of IBM global services. A graduate of the United
    States Naval Academy, Bailey also holds a graduate degree in
    engineering from the University of California-Berkeley and an MBA
    from George Washington University.

--  Richard Welch, vice president of customer services and support,
    leads the customer support organization at ATG. Welch joined ATG
    from Parametric Technology where he served in a variety of
    positions, most recently as senior vice president of customer
    support and operations worldwide. Prior to that, Welch held
    positions for several years with Prime Computer and Stone and
    Webster. He holds a Bachelor of Science in mechanical engineering
    from Worcester Polytechnic Institute.

--  As Vice President of global alliance sales, Ian Dwyer drives the
    expansion of ATG global alliances with systems integrators,
    technology partners, original equipment manufacturers, independent
    software vendors, and application service providers. Dwyer joined
    ATG after 15 years with IBM and Oracle in Europe, most recently as
    director of strategic platform alliances for Oracle, EMEA.
    Educated in England, Austria, and the U.S., Dwyer earned a
    Bachelor of Arts from the University of San Francisco.

--  Tim Marken, vice president of corporate development, heads ATG
    business development efforts, including mergers and acquisitions.
    Prior to joining the ATG team, Marken spent eight years with
    Gartner Group, where he served as senior vice president of U.S.
    sales. Marken also held numerous sales management positions at
    Xerox Corporation. He holds a Bachelor of Science degree in
    economics and finance from Babson College and an MBA from the
    Harvard Business School.

About ATG

ATG is a leading provider of online customer relationship management and electronic 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 solution partners, ATG has delivered e-business solutions to over 670 companies worldwide including 3M, Aetna Services, Inc., American Airlines, Blockbuster, BMG Direct, ChipCenter, Eastman Kodak, HSBC, Herman Miller, J. Crew, Sun Microsystems, and Target. The company is headquartered in Cambridge, Massachusetts with additional locations throughout North America, Europe, Asia and Australia.

Dynamo, 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.

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 business generally may be found in periodic ATG 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 individuals who recently joined ATG management will not remain at ATG; that the addition of these individuals will not enhance the company's growth or development; and that the Asia/Pacific market will not be profitable for ATG. ATG undertakes no obligation to update any of the forward-looking statements after the date of this press release.