Belledonne Communications is the creator of the Linphone project, the leading open source softphone for smartphones and desktop platforms, allowing communication systems developers to build their own customised solutions.

We provide a high-quality and complete software solution for audio and video over IP calling and Instant Messaging. This comprises of three elements : the Linphone application, the Liblinphone SDK, and Flexisip, our scalable server suite with proxy, presence, account management and conference functions.

Our VoIP solution is interoperable with most PBXs and SIP infrastructures, adhering to open standards built around the SIP protocol.

On this wiki, you will find everything related to the development of Linphone and its integration on the platform of your choice.


Linphone is an open source softphone for voice and video over IP calling and instant messaging, which makes it possible to communicate freely with people over the internet. It is fully SIP-based, for all calling, presence and IM features.

Linphone is available for smartphones, tablets and desktop platforms :

  • mobile:  iOS, Android
  • desktop:  GNU/Linux, macOS, Windows Desktop, Windows 10
  • embedded targets : Yocto, Xamarin


Liblinphone is a high-level SIP library integrating all calling and instant messaging features into an unified easy-to-use API.

It is the cross-platform VoIP library on which the Linphone application is based, and that anyone can use to add audio and video calls or instant messaging capabilities to an application.


Flexisip is a complete, modular and scalable SIP server suite written in C++11, comprising proxy, presence and group chat functions.

Flexisip offers an easy-to-install server solution, offering all the features required to deploy your own SIP service tuned for mobile or desktop applications, "out of the box".

Created by superadmin on 2009/09/09 00:00