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


Telecom services and systems.


Local Mail Business Phone

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.

Local Mail


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.


Smile Telecoms

Smile provides 4G LTE mobile broadband services.

Smile Telecoms

Elastix – MT

Open source Linux distribution focused on VoIP and unified communications.

PaloSanto Solutions

Zoon Suite

IP telephony operator in Spain.

Zoon Suite


Spanish telephony and unified communications provider.



Daktela is an omnichannel cloud-based solution for contact centers. We use Kamailio for providing our customers with a robust gateway enabling connections from various locations to our services and for building resilient connections between various telco components.

Daktela s.r.o.


World wide DID market place.

DID eXchange


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



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



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


Thirdlane Cloud PBX

Cloud PBX platform.



Commercial Kamailio support, consultancy, and hosting.

LOD Communications, Inc.

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.

Chinna Technologies

Open IMS Core

Open source IMS core prototype implementation.

FhG Fokus

Nimvelo Phone

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

Nimvelo (Sipcentric Ltd)

Xtra Telecom

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

Xtra Telecom

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.

Sipwise GmbH

modulus VoIP Services

IP Telephony operator based in Athens, Greece.

modulus S.A.


One of the largest IP telephony providers in Germany.


Divssol Inc.

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

Divssol Inc.


LibreSBC is a open-source Session Border Controller provide robust security, simplified interoperability, advanced session management, high performance, scale of carrier-grade and reliability for voice over IP (VoIP) infrastructures. LibreSBC designed to typically deployed at the network edge, the demarcation points (borders) among networks/environments.



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


Airbnb CX Hotline Infrastructure

As presented on YouTube (https://www.youtube.com/watch?v=utZHJK5otjI), Airbnb uses Kamailio to help provide 99.999% reliability for a call center with a world wide footprint.


FhG Fokus

Open communications research and prototyping.

FhG Fokus Research Insititute


IP Telephony operator based in Milano, Italy.



SBC products and SIP consultancy services.


Greenfield Technologies

Real time communications solutions and services.

Greenfield Technologies


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


Beneffy Telecom

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



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…

Evariste Systems LLC


IP telephony operator and MVNO in Germany.



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



SIP and Kamailio consultancy, trainings, support and development.

Asipto, Germany


SipFlare is a VoIP firewall and anti-fraud system, enables the scalability of Telco systems and migration support with intelligent routing engine, available in cloud or on premise.

evoseed S.r.l.


Second biggest telephony operator in Germany.

1&1 AG

Core Network Dynamics

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

Core Network Dynamics

Simeon Networks

We offer business phone services in the United States using FreeSwitch and Asterisk, all backed by Kamailio.

Simeon Networks


Free SIP service with iNum and UK inbound numbers.

VoIP User Forum


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.



AfriCallShop is specialized on calls to Africa from the world to make it. We provide high-quality communications and a text messages services at economic prices.

We use Kamailio as to provide the following services: SBC and REGISTRAR.



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

Orange Vallee

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