Linphone is one of the most famous open source softphones in the world. It is fully SIP-based, for all calling, presence and IM features.
Use Linphone for free, and enjoy its intuitive interface and advanced features with our free SIP service or with an existing SIP account.
Easy-to-use graphical interface :
- account creation assistant
- smart contact list, with address book synchronisation for smartphones
- call history
- "Invite your friends" option
- remote provisioning from a QR Code or a URL
Advanced calling features :
- HD video calls with video preview (H.264, H.265 and VP8 codecs supported)
- audio/video conference calls and scheduled meetings
- call transfer and multi-call management (pause and resume)
- call recording and replay (audio only)
Increased audio and video quality :
- state-of-the-art adaptive jitter buffer algorithm
- innovative adaptive bitrate control
- HD voice (Opus support) and echo cancellation
- call quality indicator and display of advanced call statistics
Enhanced Instant Messaging experience :
- one-to-one and multi-participant conversations
- intuitive message delivery status (IMDN)
- file sharing (photo, video, document, voice/video message)
- reply to / forward / copy options
- multi-device support
- advanced IM notifications, with "reply to" and "mark as read" options
Secure communications :
- secure user authentication
- end-to-end encryption of audio/video calls, messages and shared files
- post quantum encryption
- ephemeral messaging
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