This is a list of notable companies providing Voice over Internet Protocol (VoIP) services.
| Company | Base of operations | Country | Services provided |
|---|---|---|---|
| EMAXX | Concord, Ontario | Canada | A-Z voip routes seller |
| Access Communications | Regina, Saskatchewan | Canada | Cable television services |
| AstraQom | Ottawa, Ontario | Canada | VoIP services and integrated communication solutions[ buzzword ] |
| AudioCodes | Airport City | Israel | Networking products and applications to service providers and enterprises |
| Avid Telecom | Arizona | United States | Interconnection services |
| AVM GmbH | Berlin | Germany | DSL, ISDN, Wireless, and VoIP products for communications devices |
| BigAir | Sydney | Australia | DSL services and Australia's National Broadband Network |
| Comwave | Toronto | Canada | Web and Mobile applications, VoIP telephone service, broadband internet providers, and commercial telecommunication service |
| Fastweb S.p.A. | Milan | Italy | Landline, broadband Internet, and digital television services |
| 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[ buzzword ] |
| Mobivox | Montreal | Canada | International calling service using VoIP and IVR |
| Nfon | Munich | Germany | Cloud-based telephone systems |
| Nextiva | Scottsdale, Arizona | United States | Cloud-based Communications, VoIP and IVR |
| 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 |
| TELES AG | Berlin | Germany | VoIP services |
| 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 |
| 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. |