Asterisk

An open-source telephony server for building your own PBX and VoIP phone systems.

FreeOpen sourceLinuxSelf-hosted
Official websiteasterisk.org

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About Asterisk

Asterisk is telephony software you run on your own server to build a private branch exchange (PBX) and VoIP phone system. It handles calls between phones and connects to outside telephone services.

It is a framework rather than a finished product, so it suits administrators and developers who are comfortable configuring a phone system from the ground up, and it is also the base for many ready-made PBX distributions.

Strengths

  • Run your own PBX and VoIP system
  • Flexible enough to build custom telephony setups
  • Open source with no license fees

Limitations

  • Configuration requires telephony knowledge
  • A framework to build on rather than a ready-to-use phone system

Details

Pricing
FreeFree and open source.
License
Open source, license not stated
Developer
The Asterisk contributors
Platforms
Linux, Self-hosted
How it runs
Downloadable app, Self-hosted
Account
Not required
Best suited for
Administrators building a self-hosted phone system
Last verified
Added
Provenance
Facts checked against the developer's own pages and store listings, 1 sources on file.

Alternatives to Asterisk

Compare all

Software that can replace Asterisk for an important use case, and what changes if you switch.

  • FreeSWITCH

    A self-hosted software telephony platform for voice, video and chat that runs on commodity hardware.

    FreeOpen sourceWindowsmacOSLinuxSelf-hosted

    FreeSWITCH is also open source and self-hosted, handles voice, video and chat, runs on hardware from a Raspberry Pi upward, and is mainly distributed as source code to build.

  • FusionPBX

    A self-hosted web interface and platform for running a multi-tenant PBX on FreeSWITCH.

    FreeOpen sourceWebSelf-hosted

    FusionPBX gives you a multi-tenant PBX managed from a web interface, with call center, fax, voicemail and conferencing, but you must run a FreeSWITCH server underneath it.

  • 3CX Free Basic

    A free edition of the 3CX business phone system for up to 10 users on your own infrastructure.

    FreemiumProprietarySelf-hosted

    3CX Free Basic is a more ready-to-use business phone system with no licence cost, but it is proprietary and limited to 10 users and 4 simultaneous calls.

Similar software

Related functionality, not necessarily a direct replacement.

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