Complete software solution
For real-time communication application developers
VoIP, video calls, instant messaging, and conferencing
Enhance your communication applications and connected products
Our modular software suite provides all the essential tools to design your telecommunication solutions. Whether you’re looking to develop your own application with a modern VoIP SDK, leverage the intuitive interfaces of our Linphone softphone, or deploy a complete end-to-end SIP communication network, we offer the technological building blocks tailored to your needs.
Integrate
call or chat features into your applications
Customize
the Linphone softphone as a white-label solution
Deploy
a complete telecommunication network
Enhance
your business telephony platform
HD audio and video calls
Meetings and group calls
Call management features
Instant messaging
Secure communications
User authentication
Push notifications
Remote configuration
Contact management
SIP system interoperability
Software architecture
A complete client/server solution for your applications
All the software that makes up our solution for VoIP calls, video conferencing, and instant messaging is developed in-house by our teams. Based on IETF-standardized protocols and fully open-source, these solutions are fully interoperable with most SIP phones and IP-PBX systems.
Client software
The Linphone application includes the user interfaces and relies on the Liblinphone library. This library consists of two key components: Mediastreamer2, dedicated to audio and video streaming, and Belle-sip, responsible for SIP signaling.
Server software
The Flexisip server suite consists of two projects: Flexisip, which includes a SIP proxy, a presence server, an instant messaging and conferencing server, and a gateway to traditional telephony; and Flexisip Account Manager, for account management and configuration.
Additional modules
For your project, other software may be useful. The bcg729 library enhances audio quality during SIP-PSTN connections. Our encryption technologies enable you to develop a state-of-the-art secure communication solution.
bcg729
Implementation of the G729 codec for better audio quality when connecting your SIP network with the PSTN network.
Linphone Instant Messaging Encryption
LIME, an end-to-end encryption library for instant messaging.
Post Quantum Crypto Engine
Encryption module resistant to attacks from future quantum computers.
Everything you need to get started
Test Linphone and Flexisip now
Visit our Getting Started page to find out where to download the Linphone softphone, how to set up an account, or test the application with your existing VoIP infrastructure.
Open source
100% of the source code is open source! Rely on transparency and reliability.
Interoperability
for seamless integration with enterprise IP-PBX systems and hardware SIP phones.
Why choose our software?
Services
consulting, support, and custom development
Expertise
on telecommunications protocols and application development
License model
Whether open source or proprietary, the choice is yours.
All software developed by Belledonne Communications is available under a dual license. Our proprietary licenses give you the right to modify the source code while keeping your sources closed!
Open source license
Our client and server software can be integrated into your project under the terms of the GNU GPLv3 and Affero GPLv3 open source licenses.
Proprietary license
Want to bypass the terms of the GPL and AGPL licenses? Purchase a source code license.
Learn more about our commitments
Services
Rebranding
Contact our mobile and desktop app developers to customise Linphone with your brand.
Support contracts
Subscribe to our annual support contracts to receive fixes directly from the Linphone developers.
Custom development
Fund the development of new features or the adaptation of Linphone to meet your specific needs.
Server installation
We handle the end-to-end deployment of your SIP service based on the Flexisip server suite.
They trust us
"We needed a complete library kit (SIP, RTP, codecs) to implement telephone communication functionality in our software […]. Linphone proved to be very stable. Support by email works well, responses are fast and comprehensive. The fix is short, elegant, and the quality of code is quite high."
Haavel Rein, Head of Department of Cybernetica
Got a project? Contact us!
Are you planning to develop a real-time communication solution for your brand? Fill out our contact form to get information about our software components for VoIP, video conferencing, and instant messaging.
Discover our latest news
Linphone Desktop 3.9 release
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Get an exclusive preview: test the new Linphone Android beta!
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