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Linphone

Open-source SIP voice, video, and messaging client

Chat & Communication ★ 508 stars Medium setup GPL-3.0

Linphone is a free SIP-based softphone for voice and video calls and instant messaging. Combined with a SIP server it forms a fully self-hosted communication stack across desktop and mobile.

Official siteSource code

Key features

  • SIP voice and video
  • End-to-end encryption with ZRTP
  • Cross-platform clients
  • Instant messaging support

Strengths

  • Released under the GPL-3.0 license
  • Written in C++
  • Tiny footprint — runs in 128 MB RAM

Is Linphone secure?

OSV.dev has no published security advisories for Linphone's repository. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

Source: OSV.dev, checked 2026-10-14. How this is measured.

Linphone replaces

Self-hosted Skype alternativesSelf-hosted Zoom alternatives

Health badge

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SelfHostIndex: 74 · good

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   :alt: SelfHostIndex health score for Linphone
   :target: https://selfhostindex.com/app/linphone/

The score is recomputed on every nightly rebuild from public repository data — see how it is calculated.

Compare Linphone

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