Used By

Open source IMS core prototype implementation.

Open source Linux distribution focused on VoIP and unified communications.

Spanish telephony and unified communications provider.

World wide DID market place.

Enswitch is a full-featured multi-tenant softswitch for commercial telephony services such as hosted PBX, residential ITSP, SIP trunking, calling cards and more. It scales to tens of thousands of concurrent calls and hundreds of thousands of users on a full redundant cluster. It includes extensive hosted PBX features, prepaid and postpaid billing, invoicing, a web interface for system administrators, resellers, and customers, and a complete JSON API. It’s in production with carriers around the world, from single machine systems running tens of users to systems with several hundred thousand users. It’s also used by enterprises as a corporate PBX where high scalability and redundancy are required, especially across multiple sites.

Smile provides 4G LTE mobile broadband services.

Free SIP service with iNum and UK inbound numbers.

Consultancy, development and trainings for Kamailio, Kazoo and FreeSwitch projects.

A mobile communications service – voice, chat, sharing, …

Real time communications solutions and services.

Telecom services and systems.

One of the largest IP telephony providers in Germany.

Solutions to access, control and services for mobile networks – EPC, IMS.

Commercial Kamailio support, consultancy, and hosting.

IP telephony operator and MVNO in Germany.

Free SIP and WebRTC service – voice, video, instant messaging and presence.

SIP and Kamailio consultancy, trainings, support and development.

Open communications research and prototyping.

Global MVNO and VoIP service, one SIM with multiple telephone numbers from different countries.

SBC products and SIP consultancy services.

Kamailio lies at the call processing core of CSRP, a high-performance SIP call routing, accounting, rating and LCR solution for SIP trunking providers, hosted PBX…

US Based VoIP Phone Service Provider focused on Small Business and Enterprise Market, offering SIP trunking services along with hosted PBX solutions.

PRIVISIP is a free (as in beer) TLS/SIP service for your endpoint, pbx, or other sip device. Powered by Kamailio.

Internet phone service tailored for small businesses and start-ups, also having full REST API for integration with other services.

Spanish telephony provider focused on enterprise market, offering SIP trunking services along with hosted PBX’s

KAZOO is an open-source, highly scalable software platform designed to provide carrier-grade VoIP switch functions and features. Developers, system administrators, and telecom engineers can build flexible, reliable telecom services using the extensive KAZOO APIs.

Cloud PBX platform.

Large VoIP?telephony provider in Norway and couple of other European countries.

Second biggest telephony operator in Germany.

Free SIP service since early 2000 with option to host personal domain.

Open source platform targeting IP telephony operators, embedding Kamailio, SEMS and Asterisk, packaged with billing system, web interfaces for administrators and subscribers.