Ready to Get Started with Asterisk?
Asterisk is a free and open source framework for building communications applications and is sponsored by Sangoma.

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
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.
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.
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.

Asterisk News
Asterisk 18.14.0-rc2 Now Available
August 11, 2022
Asterisk 19.6.0-rc2 Now Available
August 11, 2022
Asterisk 16.28.0-rc2 Now Available
August 11, 2022
Asterisk 19.6.0-rc1 Now Available
July 28, 2022
Asterisk 18.14.0-rc1 Now Available
July 28, 2022
Security Advisories
AST-2022-001: res_stir_shaken – Resource exhaustion with large files
April 14, 2022
AST-20220-002: res_stir_shaken: Blind SSRF vulnerabilities
April 14, 2022
AST-20220-003: ${SQL_ESC()} not correctly escaping a terminating \
April 14, 2022