Compare software

Asterisk3CX Free Basic
Free

Free and open source.

 Freemium

Free for up to 10 users and 4 simultaneous calls; larger editions are paid.

Linux, Self-hosted Self-hosted
  • Run your own PBX and VoIP system
  • Flexible enough to build custom telephony setups
  • No licence cost for small teams
  • Runs on your own infrastructure
  • Configuration requires telephony knowledge
  • A framework to build on rather than a ready-to-use phone system
  • Limited to 10 users and 4 simultaneous calls
  • Proprietary software
Downloadable app, Self-hosted Self-hosted
Open source Closed source
License not stated License not stated
No account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 24, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.