This is a list of notable companies providing Voice over Internet Protocol (VoIP) services.
Company Base of operations Country Services provided Aastra Technologies Concord, Ontario Canada The manufacture of products and systems for accessing communication networks Access Communications Regina, Saskatchewan Canada Cable television services AstraQom Ottawa, Ontario Canada VoIP services and integrated communication solutions AudioCodes Airport City Israel Networking products and applications to service providers and enterprises Avid Telecom Arizona United States Interconnection services AVM Berlin Germany DSL, ISDN, Wireless, and VoIP products for communications devices BigAir Sydney Australia DSL services and Australia's National Broadband Network CallFire Santa Monica United States Web-based VoIP Cisco San Jose, CA United States Networking, Hardware phones, Software such as Webex, and Jabber, and systems such as CallManager/Unified Communications Manager Fastweb Milan Italy Landline, broadband Internet, and digital television services Google California United States instant messaging, video chat, SMS, and VoIP features through Google Hangouts and Google Voice Internode Adelaide Australia ADSL broadband, Internet access, web hosting, VoIP, and related services Mind CTI Yokneam Israel Billing and customer care solutions Mobivox Montreal Canada International calling service using VoIP and IVR Nextiva Scottsdale, Arizona United States Cloud-based Communications, VoIP and IVR Nfon Munich Germany Cloud-based telephone systems Ooma Palo Alto, California United States VoIP communications for small businesses, home and mobile Radvision New Jersey United States Video conferencing and telepresence technologies RingCentral Belmont, CA and London United States and UK Cloud-based telephone systems Sipgate Düsseldorf Germany VoIP and mobile phone services sipservice Winterthur Switzerland VoIP service provider Skype Palo Alto, CA United States Manufacturing and marketing of the video chat and instant messaging computer software program Skype and various Internet telephony services associated with it TELES AG Berlin Germany VoIP services Telnyx Austin, Texas United States VoIP and cloud computing VirtualPBX San Jose, CA United States Cloud-based telephone systems VocalTec West Palm Beach and Netanya United States and Israel Telecom equipment provider VoiceHost London United Kingdom VoIP and DSL provider Voipfone London United Kingdom Cloud based Internet Telephony Provider Vonage New Jersey United States, Australia, UK, Canada Commercial telecommunication services
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