Used By

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

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.

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

Commercial Kamailio support, consultancy, and hosting.

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

We offer best VoIP telephony solution to customer by using Kamailio.

Smile provides 4G LTE mobile broadband services.

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

Free SIP service with iNum and UK inbound numbers.

Cloud PBX platform.

Open source IMS core prototype implementation.

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

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

OV500 is an open source billing and switching solution developed by the openvoips community managed by Chinna Technologies. The solution is based on Kamailio, RTPProxy and FreeSwitch.

Spanish telephony and unified communications provider.

SBC products and SIP consultancy services.

IP telephony operator and MVNO in Germany.

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…

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

IP Telephony operator based in Athens, Greece.

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

One of the largest IP telephony providers in Germany.

IP telephony operator in Spain.

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

SIP and Kamailio consultancy, trainings, support and development.

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

Real time communications solutions and services.

Open source Linux distribution focused on VoIP and unified communications.

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

Telecom services and systems.

Second biggest telephony operator in Germany.

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

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.

IP Telephony operator based in Milano, Italy.

Open communications research and prototyping.

World wide DID market place.