Dec 23, 2025 · OpenSIPS is an Open Source SIP proxy/server for voice, video, IM, presence and any other SIP extensions.

List of SIP software This list of SIP software documents notable software applications which use Session Initiation Protocol (SIP) as a voice over IP (VoIP) protocol.

OpenSIPS is a GPL licensed SIP server implementation. It started as a fork of Fokus Fraunhofer SIP Express Router (SER) project. OpenSIPS wants to be a more open project, not only from license …

Sep 3, 2021 · Kamailio® (successor of former OpenSER and SER) is an Open Source SIP Server released under GPLv2+, able to handle thousands of call setups per second. Kamailio can be used …

Professionally supported open source, portable, small footprint multimedia communication libraries written in C language for building portable VoIP applications. Includes implementation of SIP, RTP, …

Liblinphone is a high-level open-source library that integrates all audio/video call (VoIP, video), conferencing, and instant messaging features through a single cross-platform API based on the SIP …

A comprehensive 2025 guide to the best open‑source SIP servers, including Asterisk, FreeSWITCH, Kamailio, and OpenSIPS, with features, code examples and professional insight.

Jan 4, 2023 · SIP open source servers allows you to create your own server with a low cost, unlike many commercial alternatives. Here is our list: OpenSIPS is a free open source SIP proxy/ server that …

MicroSIP is a portable SIP softphone based on the PJSIP stack available for Microsoft Windows operating systems. It facilitates high quality VoIP calls (p2p or on regular telephones) based on the …

Free Open Source fully-functional VoIP platforms to address real-life usage scenarios. Easy and fast to deploy and start using.