A randomized listing with companies, products or services using Kamailio®. You are welcome to add new entries via submission form (click here).
SIP:Provider CE

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

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

Spanish telephony and unified communications provider.
Telio

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

Open communications research and prototyping.
Nimvelo Phone

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

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…
Divssol Inc.

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

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

Smile provides 4G LTE mobile broadband services.
OpenRCS.com

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

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

Commercial Kamailio support, consultancy, and hosting.
2600hz

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

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.
Elastix – MT

Open source Linux distribution focused on VoIP and unified communications.
Asipto

SIP and Kamailio consultancy, trainings, support and development.
OV500 Billing and Switching Solution

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.
Core Network Dynamics

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

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

IP Telephony operator based in Athens, Greece.
Beneffy Telecom

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

Free SIP service with iNum and UK inbound numbers.
Greenfield Technologies

Real time communications solutions and services.
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