Compare software

3CX Free BasicFreePBX
Freemium

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

 Freemium

Free and open source, with optional paid commercial modules and support.

Self-hosted Web, Self-hosted
  • No licence cost for small teams
  • Runs on your own infrastructure
  • Free to download and run on your own server
  • Web interface for managing the phone system
  • Limited to 10 users and 4 simultaneous calls
  • Proprietary software
  • Requires running and maintaining your own server
  • Some advanced features are in paid commercial modules
Self-hosted Self-hosted
Closed source Open source
License not stated License not stated
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 23, 2026

Checked September 23, 2026

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