As of 1 December 2009, the World Wide Web Consortium (W3C) has 340 Members. Find more statistics about W3C Members.

• 24-7 Co.,Ltd.
• ACCESS Co., Ltd.
• ACORD Corporation
• Adesis Netlife S.L.
• Adobe Systems Inc.
• Afilias Limited
• Agencia para el Desarrollo del Gobierno de Gestion Electronica y la Sociedad de la Informacion y del Conocimiento (AGESIC)
• AgileDelta, Inc.
• Akmin
• Alcatel-Lucent
• Alisys Software
• Altova GmbH
• Alzheimer Research Forum Foundation
• Amadeus s.a.s.
• AME Info FZ LLC
• American University
• ANCOSO Business Technologies AG
• ANDANZA TECHNOLOGIES
• ANEC European Association for the Co-ordination of Consumer Representation in Standardisation
• Antenna House, Inc.
• Apple, Inc.
• Applied Information processing and Kommunications (IAIK)
• ARTSTAFF CO., LTD.
• Asemantics S.R.L.
• Aspect Communications
• AT&T
• Atal Behari Vajpayee - Indian Institute of Information Technology and Management, Gwalior
• Australian Government Information Management Office (AGIMO)
• Avaya Communications
• Ayuntamiento de Zaragoza
• Bartimeus - Accessibility
• Beihang University
• Beijing University of Technology
• Bitstream, Inc.
• BoaB interactive Pty Ltd
• The Boeing Company
• University of Bologna
• Brainstage Research, Inc.
• British Broadcasting Corporation
• BT
• Business Directory UK
• Bytemobile, Inc.
• CA
• Cambridge Semantics
• Canon, Inc.
• Center for Democracy and Technology
• CWI
• Centre for Development of Advanced Computing (CDAC)
• Centro Europeo de Estudios y Formación Empresarial Garrigues
• Centro de Treinamento iLearn
• CERN
• Chevron
• China Electronics Standardization Institute
• Chinese Academy of Sciences
• Cibenix Limited
• Cisco
• Clark & Parsia LLC
• Cleveland Clinic
• Clinical and Biomedical Computing Ltd
• CNR--Consiglio Nazionale delle Ricerche
• College of American Pathologists
• College of Computer and Software Engineering in Taiyuan University of Technology (TYUT)
• CommerceNet
• Competence Centre for Interoperable Metadata (KIM) / Kompetenzzentrum Interoperable Metadaten (KIM)
• Computas AS
• Creative Commons
• CSI-Piemonte
• CSIRO
• CSP s.c.a.r.l.
• Daimler Chrysler Research and Technology
• DAISY Consortium
• Data Recovery Software
• Data Recovery Software
• DataDirect Technologies
• Defense Information Systems Agency (DISA)
• Department of Informatics, PUC-Rio
• Department of Information and Communication Technology - University of Trento
• Department of Information Technology, Government of India
• Deque Systems, Inc.
• DERI Galway at the National University of Ireland, Galway, Ireland
• Design Science, Inc.
• Deutsche Telekom AG
• DigiCert SSL Certificate Authority
• Digital Media Institute, Tampere University of Technology
• DIGITALSCAPE
• Dipartimento di Informatica, Università degli Studi di Pisa
• Disruptive Innovations
• Dow Jones & Company
• Dreamlab Technologies AG
• Ecole Mohammadia d'Ingenieurs Rabat (EMI)
• Ecole Superieure Polytechnique
• University of Edinburgh
• Eindhoven University of Technology
• Electronics and Telecommunications Research Institute (ETRI)
• Eli Lilly and Company
• elmundo.es
• EMC Corporation
• Empolis GmbH
• Energistics
• Enigmatec Corporation
• ENISA (European Network and Information and Security Agency)
• ERICSSON
• European Broadcasting Union (EBU-UER)
• examotion GmbH
• FinanzNachrichten.de
• FLWOR Foundation
• Fondazione Bruno Kessler
• Formations House
• Forschungszentrum Informatik (FZI)
• Fotosearch Stock Photography and Footage
• Foundation for Research and Technology - Hellas(FORTH)
• France Telecom
• Fraunhofer Gesellschaft
• Free University of Bozen-Bolzano
• FSTC (Financial Services Technology Consortium)
• Fujitsu Limited
• Fundacion CTIC
• Fundación ONCE
• Futuver Consulting
• Garlik
• Genesys Telecommunications Laboratories
• German Research Center for Artificial Intelligence (DFKI) Gmbh
• Gijón City Council
• Gobierno del Principado de Asturias
• Google, Inc.
• Grupointermark 96, S.L.
• Health Level Seven, Inc.
• Helsinki University of Technology
• HP
• HiSoftware Inc.
• Hitachi, Ltd.
• HOB GmbH & Co. KG
• Hutchison 3G
• IBBT
• IBM Corporation
• iFLYTEK
• Ikivo AB
• IKM Internet Kaufmarkt GmbH
• Image, Video and Multimedia Systems Lab (IVML-NTUA)
• IMG SRC, Inc.
• Imperial College London
• Industrial Technology Research Institute (ITRI)
• Infopark AG
• Infoteria Corporation
• INNOVIMAX
• INSTITUT TELECOM
• Institut National de Recherche en Informatique et en Automatique (INRIA)
• Institute of Informatics & Telecommunications (IIT), NCSR
• Instituto Nacional de Tecnologias de la Comunicacion, S.A.
• Intel Corporation
• International Webmasters Association / HTML Writers Guild (IWA-HWG)
• Internet Academy, Inc.
• Internet Association Japan (IA Japan)
• Intervoice, Inc.
• Inventive Designers n.v.
• ISeC
• Israel Internet Association (isoc-il)
• ISTIC
• Istituto per la Ricerca, la Formazione e la Riabiltazione - Onlus (I.Ri.Fo.R.)
• IVIS Group Limited
• Jataayu Software
• JOANNEUM RESEARCH Forschungsgesellschaft mbH
• Joint Info. Systems Comm. of the UK Higher Ed. Funding Council (JISC)
• Jozef Stefan Institute
• JustSystems Corporation
• K-Space
• Kaiser Permanente
• Korea Association of Information & Telecommunication
• Korea Institute of Science & Technology (KIST)
• Kyoto Institute of Technology
• Larson Software Technology
• Lawrence Berkeley National Laboratory
• Library of Congress
• LINK Development
• Logistics Management Institute (LMI)
• Loquendo, S.p.A.
• Los Alamos National Laboratory
• MacKichan Software, Inc.
• Manufacturers' Association for Information Technology
• Marden Edwards Limited
• Mark Logic Corporation
• Mayo Clinic
• Media Access Australia
• Meraka Institute
• Merck & Co., Inc.
• Metatomix inc
• Microsoft Corporation
• MIMOS BHD
• MIND Center for Interdisciplinary Informatics
• Ministerio de Administraciones Públicas
• MITRE Corporation
• Mitsue-Links Co., Ltd.
• Mobile Web 2.0 Forum
• Mobileaware, Ltd.
• Monotype Imaging Inc.
• Mozilla Foundation
• MTA SZTAKI
• mTLD Top Level Domain Limited
• National Association of Convenience Stores (NACS)
• National ICT Australia (NICTA) Ltd
• National Institute of Informatics
• National Institute of Standards and Technology (NIST)
• National Research Council Canada
• NetApp
• Netzwelt.de
• New Zealand State Services Commission
• NexTag, Inc.
• Nextstage Corporation
• NIC.br - Brazilian Network Information Center
• Nippon Telegraph & Telephone Corp. (NTT)
• Nokia
• Nominet
• Novarra, Inc.
• Novartis Pharma AG
• NRCD Research Institute (National Rehabilitation Center for Person with Disabilities)
• NTT DoCoMo
• Nuance Communications, Inc.
• OASIS (Organization for the Advancement of Structured Information Standards)
• Object Management Group, Inc. (OMG)
• OCLC (Online Computer Library Center, Inc.)
• Office of the Government Chief Information Officer (OGCIO)
• OMTP Limited
• Ontotext
• Open Geospatial Consortium
• The Open University
• OpenLink Software Inc.
• Openstream, Inc.
• Openwave Systems Inc.
• Opera Software
• opus5 interaktive medien gmbh
• Oracle Corporation
• Orbeon, Inc.
• Ordnance Survey
• Origo Services Limited
• Parkyeri
• Partners HealthCare System, Inc.
• PayPal, Inc.
• Pfizer Inc
• PicoForms
• Presidenza del Consiglio dei Ministri
• Profium Ltd.
• Progeny Systems
• Progress Software
• Prometheo
• PTC-Arbortext
• Qualogy
• Quickoffice Inc
• Raining Data Corporation
• RealNetworks
• Red Hat
• Entidad pública empresarial Red.es
• RenderX
• Rensselaer Polytechnic Institute
• Research In Motion, Ltd. (RIM)
• Rochester Institute of Technology
• Royal National Institute of Blind People (RNIB)
• Samsung Electronics Co., Ltd.
• SandCherry, Inc.
• Sandpiper Software, Inc.
• SAP AG
• Science Commons (Creative Commons)
• Search Engine Optimization Inc.
• Seeburger AG
• seekXL
• Semantic Universe
• Seresco, S.A.
• SERPRO (Brazilian Federal Agency of Information Technology)
• SFR
• SGKP
• SICS
• Siemens AG
• SIZ Informatikzentrum der Sparkassenorganisation GmbH
• SK Telecom
• SKYARC System Corporation
• Sociedad Asturiana de Diversificación Minera S.A. (SADIM S.A.)
• Software AG
• Sony Ericsson Mobile Communications AB
• University of Southampton
• Sozon Inc.
• SRI International
• Stadt Branchenbuch GmbH
• Stanford University
• STFC (Science & Technology Facilities Council)
• Strands
• Sun Microsystems, Inc.
• SURF net bv
• Swiss Federal Institute of Technology (ETH Zürich)
• Syncro Soft
• Syntellect Inc.
• Talis Information Limited
• Telecom Italia SpA
• Telefónica de España, SAU
• Teranode Corporation
• The American Institute of Architects
• The Apache Software Foundation
• The National Archives
• ThinkCo Ltd
• Third Party Formations Limited t/a The Company Warehouse
• Thunderhead Ltd.
• TIBCO Software, Inc.
• TNO Telecon
• TopQuadrant
• Toshiba Corporation
• TSSG
• U-Turn Media Group
• United States Holocaust Memorial Museum
• Universidad de Oviedo
• Universidad Politécnica de Madrid
• Universitat Politècnica de Catalunya
• Université catholique de Louvain
• Université de Versailles St-Quentin (Labo. PRiSM)
• University of Aberdeen, Computing Science
• University of Amsterdam
• University of Applied Sciences Potsdam
• University of Helsinki
• University of Innsbruck
• University of Manchester
• University of Oxford
• University of Southern California Information Sciences Institute (USC / ISI)
• Venafi
• VeriSign, Inc.
• Vishwak Solutions Pvt. Ltd.
• Vision Australia
• Vodafone
• Volantis Systems Ltd
• Voxeo Corporation
• Voxpilot Ltd.
• Vrije Universiteit
• Walt Disney Internet Group
• Waterloo Maple Inc.
• Web3D Consortium
• WebSoft International, Inc.
• WGBH National Center for Accessible Media
• World Federation of Exchanges
• Wright State University
• WSO2
• Xandros Corporation
• Xerox Corporation
• Yahoo!, Inc.
• Yale SenseLab