OpenSIPS/opensips

OpenSIPS is a GPL implementation of a multi-functionality SIP Server that targets to deliver a high-level technical solution (performance, security and quality) to be used in professional SIP server platforms.

C

1,539

17,664 commits

updated Oct 14, 2026

See the code

README

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Welcome to OpenSIPS Project

About

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 point of view, but more open as project management, especially for external contributions.

OpenSIPS wants to overcome the development latency of current SER project, to ensure a shorter path into a release for new added features. OpenSIPS is a project maintained by OpenSIPS Solutions http://www.opensips-solutions.com/ by a team including core and main developers of SER project.

Info

For information regarding the OpenSIPS installation, please see the INSTALL file.

For current developers/contributors of this project, see the AUTHORS file. For complete license information, please see the COPYING file. For an overview of OpenSIPS modules, a modules listing is available on the opensips.org website.

Docs

Documentation about each module can be found in the README file in each module directory. For online documentation, please see https://opensips.org/Resources/Documentation

For additional documentation, tutorials and examples please see also https://opensips.org/Resources/DocsTutorials

Questions

For any question related to the OpenSIPS usage, please use the users@lists.opensips.org public mailing list.

For questions regarding the development of OpenSIPS - like contributions, bug reports, etc - please use the devel@lists.opensips.org public mailing list.

For questions regarding businesses around OpenSIPS - like products,· consultancy, trainings, etc - please use the business@lists.opensips.org public mailing list.

Also there is a generic news mailing list where you can learn about what is· new or important for the OpenSIPS project, about alerts and updates regarding relaces and about events around the project. news@lists.opensips.org

OpenSIPS/opensips

OpenSIPS is a GPL implementation of a multi-functionality SIP Server that targets to deliver a high-level technical solution (performance, security and quality) to be used in professional SIP server platforms.

C

1,539

17,664 commits

updated Oct 14, 2026

See the code

README

Build Status Unit Tests OSS-Fuzz Cross Platform Builds RTP.io Coverity Scan Build Status

Welcome to OpenSIPS Project

About

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 point of view, but more open as project management, especially for external contributions.

OpenSIPS wants to overcome the development latency of current SER project, to ensure a shorter path into a release for new added features. OpenSIPS is a project maintained by OpenSIPS Solutions http://www.opensips-solutions.com/ by a team including core and main developers of SER project.

Info

For information regarding the OpenSIPS installation, please see the INSTALL file.

For current developers/contributors of this project, see the AUTHORS file. For complete license information, please see the COPYING file. For an overview of OpenSIPS modules, a modules listing is available on the opensips.org website.

Docs

Documentation about each module can be found in the README file in each module directory. For online documentation, please see https://opensips.org/Resources/Documentation

For additional documentation, tutorials and examples please see also https://opensips.org/Resources/DocsTutorials

Questions

For any question related to the OpenSIPS usage, please use the users@lists.opensips.org public mailing list.

For questions regarding the development of OpenSIPS - like contributions, bug reports, etc - please use the devel@lists.opensips.org public mailing list.

For questions regarding businesses around OpenSIPS - like products,· consultancy, trainings, etc - please use the business@lists.opensips.org public mailing list.

Also there is a generic news mailing list where you can learn about what is· new or important for the OpenSIPS project, about alerts and updates regarding relaces and about events around the project. news@lists.opensips.org

Project health

Overall

6.2/10

Maintained

10/10

Code review

2/10
OpenSSF Scorecard

Significant stargazers

Asif Saif Uddin {"Auvi":"অভি"}

978 followers · starred Jun 2016

Kristjan ESPERANTO

63 followers · starred Mar 2026

张林伟

269 followers · starred Nov 2021

Ozan Tezcan

109 followers · starred May 2018