Used By

Open source Linux distribution focused on VoIP and unified communications.

Real time communications solutions and services.

Smile provides 4G LTE mobile broadband services.

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

Open communications research and prototyping.

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

World wide DID market place.

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

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

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

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…

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

IP Telephony operator based in Athens, Greece.

Free SIP service with iNum and UK inbound numbers.

Second biggest telephony operator in Germany.

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

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

Local Mail is a cloud-based business phone system that turns conversations into opportunities and helps global teams make smarter calls–anywhere, anytime. We bring simplicity to the professional phone experience and some of the world’s most innovative companies use our platform. Localmail’s products span video meetings, cloud call centers, sales coaching, and dialers, and enterprise phone systems–and are all infused with the latest AI technologies to help every business make smarter calls, Instead of waiting weeks or months for compliance & approvals on budgets, you can instantly deploy new applications, instantly scale up as your workload grows, and pay only based on USAGE.

IP telephony operator in Spain.

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.

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

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.

IP Telephony operator based in Milano, Italy.

SIP and Kamailio consultancy, trainings, support and development.

Cloud PBX platform.

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

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

Commercial Kamailio support, consultancy, and hosting.

Open source IMS core prototype implementation.

One of the largest IP telephony providers in Germany.

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

Spanish telephony and unified communications provider.

Telecom services and systems.

SBC products and SIP consultancy services.

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

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.