Previous Companies that have attended Global Messaging include:

 160 Characters, 724 Solution UK Ltd, Acision, Adamind, AG Interactive, Agile Communication Group, Airwide Solutions, Alcatel Lucent, Alpheus, Ambulant, Anam, AOL, Arabic Computer Systems, ARPU Telecommunication Services, Ask Mobile, AT&T, ATOS Origin, Avedya, Axis Mobile, Azercell Telecom, Bango Net, Beep Science, Belgacom, BenQ Mobile, Bercut, Bharti Telesoft, BITE Lietuva, Bluecycle, Blyk, Bouygues Telecom, Broca Plc, BSG Clearing Solutions, BT, Bubble Motion, Bulksms.com, Cake, Celerity Systems Bulksms, Cell C, Cellent, Clickatell, Colibria AS, Comcom, Comverse, COSMOTE Mobile Telecommunications, Critical Path, Digit Wireless, Digital Rum, Echovox, Empower Interactive, Enpocket, Entel PCS, Ericsson, Esendex, eServGlobal, Etihad Etisalat Mobily, Eurotel Praha, Fastlink, FastMobile Ltd, Flirtomatic, Followap, Forthnet, France Telecom, FremantleMedia, Funambol, G2TEL, GCHQ, Gemini, Gemini Mobile Technologies, Globe Telecom, Go Mobile, Harvest Media, Hewlett-Packard, HeyAnita Inc, Hutchinson 3G Austria, I T E N O S, Iceland Telecom, ICQ, iCtiS, Incentivated, Info2cell Com, InfoBank, InfoPatrol Software Services, Informa Telecomms & Media, Intervoice, IP Unity, Iricom Ltd, Iskoot, Iusacell, Jabber Telecom, Jersey Telecom, Jinny, Jordan Mobile Telephone Services Fastlink, kiwanja.net, Klimax d o o, KTF, Kyivstar GSM JSC, Light Agency, LogicaCMG, MACH, Materna Information & Communication, mBalance International BV, mBlox, MEDI TELECOM, Microsoft MSN, MIRACLE MERCHANT NIGERIA LTD, Mixipix, Miyowa, Miyowa, MMIM Technologies, Mobeon, Mobile 365, Mobile Data Association, Mobile Marketing Association, Mobile Solutions Offshore SAL, Mobile Telecommunications Company, Mobiltel Bulgaria, Mobiqa, Mobitel d d, Mobixell, Moblico, Motorola, Mpathix Inc, MTC, MTN South Africa, Multimedia Solutions, NEC Corporation, Netsize, Neustar, NMS Communications, Nokia, Nokia Siemens Networks, Nordea Private Bank, Norwegian Broadcasting Co NRK, Now Wireless, O2 Germany, O2 UK, OC & C Strategy Consultants, OJSC VimpelCom, Olista, Openwave, Orange France, Orange UK, Orascom, ORGA Systems GmbH, Ovum, OZ Communications, PeykAsa, QTEL, RE5ULT Ltd, Realeyes3D, Red Box New Media, Regionalni Mediji d o o, Regtel, Regtel, Rogers Wireless Inc, Safaricom, Saudi Telecom Company, ScreenTonic, Seven Networks International, SFR, Sharif University of Technology, Show, SIBIUS International, Siemens, SK Telecom, SmartInCub SAS, Sms.at Internet Services, Sonic Duo, Spacetel Syria, Spinvox, SpinVox Ltd, Sponge, Sprint Nextel, Sudanese Mobile Telephone Co Ltd, Sunrise Switzerland, Surf Communication Solutions, Swiftpass, Swisscom Mobile, Synchronica, TA Orange Company, Tao Group, TDC Switzerland, Tecnomen Oyj, Tekelec, Telenity, Telenor, Telesoft Technologies, Telfort, Telia Denmark, TeliaSonera, TeliaSonera Finland Oyj, Telsis, The Blackdog Communications, TIM Hellas Telecommunications, TIM Italia, TMN Portugal, T-Mobile Hungary, T-Mobile International UK, T-Mobile Macedonia, Turkcell Iletisim Hizm, TynTec, United Clearing, Vee Networks Ltd Vmobile Nigeria, VeriSign, Videotop d.o.o, Visto, Vodacom South Africa, Vodafone Group Services, Vodafone live!, Vodafone Portugal, Vodafone UK, VoiceAge Networks, Warid Telecom International, WASPA, Wataniya Telecom, Wind, Yahoo!, Yankee Group, Yospace Technologies Limited, Zain, Zaviah, Zed UK, Zi Corporation, Zlango