EXHIBIT 21
SUBSIDIARIES OF CMGI, INC.
As of October 27, 2000
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Name Jurisdiction of Organization
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Maktar Limited Ireland
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Lippri Limited Ireland
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CMGI EuroHolding Limited England and Wales
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CMGI (UK) Limited England and Wales
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CMGI Europe Limited England and Wales
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1stUp.com Corporation Delaware
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Activate.Net Corporation Delaware
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Activate.net Canada Corporation Ontario, Canada
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AltaVista Company Delaware
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Shopping.com California
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Transium Corporation Delaware
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Raging Bull, Inc. Delaware
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AltaVista Internet Holding Ltd. Ireland
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AltaVista Internet Operations Ltd. Ireland
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AltaVista Internet Solutions Limited Ireland
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AltaVista AB Sweden
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Cha! Technologies Services, Inc. Delaware
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ExchangePath, LLC Delaware
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Clara Vista Corporation Virginia
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CMG Securities Corporation Massachusetts
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CMG @ Ventures Capital Corporation Delaware
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CMG @ Ventures Securities Corporation Delaware
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CMG @ Ventures, Inc. Delaware
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CMG @ Ventures I, LLC Delaware
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CMG @ Ventures II, LLC Delaware
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CMG @ Ventures III, LLC Delaware
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CMG @ Ventures Expansion, LLC Delaware
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CMGI Solutions, Inc. Delaware
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CMGion, Inc. Delaware
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AdForce, Inc. Delaware
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ADTECH Advertising Service Providing GmbH Germany
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CMGion North America, Inc. Delaware
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CMGion Securities Corporation Delaware
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Fredmay Limited Ireland
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Alyked Limited Ireland
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Rayken Limited Ireland
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Engage, Inc. Delaware
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Engage Securities Corporation Massachusetts
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AdKnowledge Inc. California
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Focalink Communications Corp. California
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ADSmart Corporation Delaware
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Engage Acquisition Corp. Cayman Islands
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Space Media Holdings Limited British Virgin Islands
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Engage Australia Pty Limited Australia
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Engage Canada Holdings Corp. Delaware
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Engage Canada Company Canada
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Engage Canada Holdings II Corp. Delaware
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Engage France SAS France
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Engage Italia srl Italy
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Engage Sverige AB Sweden
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Name Jurisdiction of Organization
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Engage Technologies Japan Japan
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Engage Technologies Limited (UK) England and Wales
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Engage Technologies GmbH Germany
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Flycast Communications Corporation Delaware
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Interstep, Inc. Massachusetts
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Flycast Deutschland GmbH Germany
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Internet Profiles Corporation California
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MediaBridge Technologies, Inc. Delaware
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MediaBridge UK Limited England and Wales
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Midsystems UK Limited England and Wales
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Equilibrium Technologies, Inc. Delaware
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Green Witch, LLC California
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iCast Corporation Delaware
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iCast Comedy Corporation Delaware
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iCast Movies Corporation Delaware
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Shortbuzz LLC Delaware
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iCast Music Corporation Delaware
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Magnitude Network, Inc. Delaware
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Signatures SNI, Inc. Delaware
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Signatures Network, Inc. Delaware
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MyWay.com Corporation Delaware
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Zip2 Corp. California
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Nascent Technologies, Incorporated Virginia
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NaviPath, Inc. Delaware
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GeoDial Company Canada
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NaviSite, Inc. Delaware
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ClickHear, Inc. Delaware
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SalesLink Corporation Delaware
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Pacific Direct Marketing Corporation California
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SalesLink DE Mexico Holding Corp. Delaware
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SalesLink DE Mexico, S. DE R.L. DE C.V. Mexico
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InSolutions Incorporated Delaware
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TwinSolutions LLC California
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On-Demand Solutions, Inc. Massachusetts
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Tallan, Inc. Delaware
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uBid, Inc. Delaware
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Bondai Limited Ireland
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Brentgrove Limited Ireland
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yesmail.com, inc. Delaware
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