Linphone is unclaimed —

Linphone

Real-time communication·linphone.org

Free plan · Open source See pricing ↓

Linphone is an open-source softphone providing VoIP calling, video conferencing, and instant messaging, developed by Belledonne Communications since 2001. It is available for desktop and mobile platforms (with a web version coming), and supports SIP-based telephony, HD audio/video codecs, group conferencing, and end-to-end encryption including post-quantum cryptography. The product also offers an SDK (Liblinphone) and server suite (Flexisip) for developers and organizations to build custom communication solutions, plus white-label and enterprise licensing options.

What it's for

VoIP audio and video callinggroup video conferencinginstant messaging and group chatcall center auto-answersecure encrypted communicationsintercom and access control systemsenterprise unified communicationscustom white-label softphone development

Features 20

Auto-answer for call centers
Automatic call relay on network change (WiFi to 3G/4G)
Blind and assisted call transfer
Call recording (audio and video) with in-app playback
Contact synchronization via LDAP and CardDAV
Dynamic media stream adaptation to network conditions
End-to-end encryption (SRTP, SRTP-DTLS, ZRTP)
Ephemeral messages
Forward Error Correction (FEC)
Full-screen video up to 1080p
Group video conferencing up to 50 participants via SFU server
HD audio/video calls with Opus, AV1, H265, H264 codecs
Instant messaging with group chats, file sharing, reactions, voice messages
Multiple simultaneous calls with hold and waiting music
Post-quantum encryption (Cristals-Kyber)
Push notifications via Firebase and APNs
Remote configuration via QR code or link
Screen sharing
Software/hardware echo cancellation
SSO authentication via OpenID Connect and OAuth 2.0

At a glance

free tieropen sourceself-hostableAPI

TypeDesktop app

DeploymentHybrid

PlatformsWindows, macOS, Linux, iOS, Android

LanguagesFrench, English

Forbusinesses, public organizations, developers, network administrators, call centers, individual users

CompanyBelledonne Communications · 2010

Integrations

Apple CarPlayApple APNsCardDAVLDAPeXo PlatformAndroid AutoGoogle FirebaseWebRTC

Complianceself-reported

GDPR

Resources

Docs

Pricing

Enterprise licensing, white-labeling, server installation, support contracts, and custom development are all quote-based; pricing is available on request.

Linphone (free app + free SIP service)Free

Described as usable for free by individual users; app downloadable free of charge.

Enterprise / Custom (quote-based)Quote

Pricing available only via personalized quote ('devis personnalisé'); no numeric pricing stated.