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Kamailio

kamailio.org

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Spec score 7.8 #13 of 52 in Voice APIs

Spec sheet

Purpose
Kamailio is open source SIP server software for building VoIP and real time communications platforms.Read 5 Oct 2026 · kamailio.org
Platforms
Kamailio runs on Unix and Linux systems, from embedded systems to large multi-core servers.Read 5 Oct 2026 · kamailio.org
Integrations
The project lists backend support including MySQL, PostgreSQL, Oracle, Radius, LDAP, Redis, Cassandra, MongoDB, and Memcached.Read 5 Oct 2026 · kamailio.org
Security
Listed security features include Digest SIP user authentication, authorization through ACL or group membership, and IP and network authentication.Read 5 Oct 2026 · kamailio.org
Support
Community support is offered free on a best effort basis through mailing lists, Matrix, and IRC.Read 5 Oct 2026 · kamailio.org
Founded
2001Read 28 Sep 2026 · kamailio.org
Communications features
It supports SIMPLE instant messaging and presence, an embedded XCAP server, and an MSRP relay.Read 5 Oct 2026 · kamailio.org
Control and monitoring
The project lists JSON and XMLRPC control interfaces and SNMP monitoring.Read 5 Oct 2026 · kamailio.org
Documentation
The project provides documentation resources including module documentation, tutorials, installation guidance, and administrator and developer documentation.Read 5 Oct 2026 · kamailio.org
Downloads
The project provides Debian and Ubuntu packages through an APT repository, RPM packages for CentOS, Fedora, and OpenSUSE, and source downloads.Read 5 Oct 2026 · kamailio.org
Extensibility
The project describes a modular architecture with more than 150 modules in its source tree.Read 5 Oct 2026 · kamailio.org
Project history
The Kamailio project describes its collaboration process as starting on November 4, 2008, following development in the SIP Express Router, Open SER, and SIP Router projects.Read 5 Oct 2026 · kamailio.org
Routing
Features include SIP forking, NAT traversal, load balancing, least cost routing, failover, and high availability replication.Read 5 Oct 2026 · kamailio.org
Server roles
It can act as a SIP registrar, location server, proxy, application server, or redirect server.Read 5 Oct 2026 · kamailio.org
Transports
It supports UDP, TCP, TLS, SCTP, IPv4, IPv6, and WebSocket for WebRTC.Read 5 Oct 2026 · kamailio.org

Plans and prices

Kamailio Free Open source; released under GPLv2 or any later version Read 5 Oct 2026 · kamailio.org

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