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Asterisk is a free and open source framework for building communications applications and is sponsored by Sangoma.

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What is Asterisk and What Can YOU Do With it?
11500000

Downloads Annually

Downloads Annually

85000

Community Members

Community Members

150

Countries with Installations

Countries with Installations

11500000

Servers Worldwide

Servers Worldwide

85000

New Endpoints Each Year

New Endpoints Each Year

Kit - Hello, World - Asterisk Mascot sticker example

IP Phones for Asterisk

• Full-color displays
• Multiple lines
• Starting at $59
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Asterisk is the #1 open source communications toolkit.

Asterisk powers IP PBX systems, VoIP gateways, conference servers, and is used by SMBs, enterprises, call centers, carriers and governments worldwide.
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Need a Phone System?

Build your own custom system with Asterisk? Buy a powerful, low-cost turnkey system based on Asterisk? Discover which option is right for you.
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AstriCon

AstriCon is the longest-running open source convention celebrating open source projects featuring Asterisk and FreePBX. Consisting of multiple tracks, sessions, and EXPO hall, AstriCon offers various levels of education sessions and provides attendees networking opportunities with some of the best in the open source community.

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Asterisk News

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Security Advisories

PJSIP_HEADER dialplan function can overwrite memory/cause crash when using ‘update’ (GHSA-98rc-4j27-74hh)

December 20, 2023

PJSIP logging allows attacker to inject fake Asterisk log entries (GHSA-5743-x3p5-3rg7)

December 20, 2023

Asterisk susceptible to Denial of Service via DTLS Hello packets during call initiation (GHSA-hxj9-xwr8-w8pq)

December 20, 2023

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