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Asterisk

Open-source framework for building telephony systems

Chat & Communication ★ 3.6k stars Hard setup GPL-2.0

Asterisk is a widely used open-source PBX and telephony toolkit that powers IP PBX systems, VoIP gateways, and conferencing servers. It supports SIP, voicemail, IVR, and call queues.

Official siteSource code

Key features

  • Full-featured IP PBX
  • IVR and call queues
  • Voicemail and conferencing
  • SIP and PSTN connectivity

Strengths

  • Released under the GPL-2.0 license
  • First-class Docker support for quick deployment
  • Active community (3.6k GitHub stars)
  • Written in C

Is Asterisk secure?

No known vulnerabilities affect Asterisk's latest release (23.5.0). OSV.dev lists 73 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-2026-23738, published 2026-02-06 (250 days ago), fixed in 23.2.2

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

Asterisk replaces

Self-hosted Avaya alternativesSelf-hosted Cisco Unified Communications alternatives

Health badge

Maintain Asterisk? Add its health score to your README. The badge links back to this page.

SelfHostIndex: 90 · excellent

Markdown
[![SelfHostIndex health score for Asterisk](https://selfhostindex.com/badge/asterisk-pbx.svg)](https://selfhostindex.com/app/asterisk-pbx/)
HTML
<a href="https://selfhostindex.com/app/asterisk-pbx/"><img src="https://selfhostindex.com/badge/asterisk-pbx.svg" alt="SelfHostIndex health score for Asterisk"></a>
reStructuredText
.. image:: https://selfhostindex.com/badge/asterisk-pbx.svg
   :alt: SelfHostIndex health score for Asterisk
   :target: https://selfhostindex.com/app/asterisk-pbx/

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

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