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Kamailio

High-performance SIP server for VoIP infrastructure

Chat & Communication ★ 3k stars Hard setup GPL-2.0

Kamailio is a mature open-source SIP server capable of handling thousands of call setups per second. It is used to build VoIP, presence, instant messaging, and real-time communication services.

Official siteSource code

Key features

  • High-throughput SIP routing
  • Presence and IM support
  • Extensive module library
  • Carrier-grade scalability

Strengths

  • Released under the GPL-2.0 license
  • First-class Docker support for quick deployment
  • Active community (3k GitHub stars)
  • Written in C

Is Kamailio secure?

No known vulnerabilities affect Kamailio's latest release (6.0.8). OSV.dev lists 37 past advisories for the project; none of them applies to this release. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

  • Most recent fixed advisory CVE-2026-108822, published 2026-10-12 (2 days ago)

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

Kamailio replaces

Self-hosted Twilio alternatives

Health badge

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SelfHostIndex: 90 · excellent

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

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