Started as a reimplementation of the open source Plivo Framework (unmaintained as of 2015), Eqivo simplifies the integration between web applications and voice-enabled endpoints, such as traditional phone lines (PSTN), VoIP phones, webRTC clients etc.

Programming language: PHP
License: MIT
Tags: Communication systems     SIP     Voip     Telephony     Programmable Voice    

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Open Source Telecommunications API Platform

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A reimplementation of the open source Plivo framework on top of ReactPHP and FreeSWITCH. If you are not familiar with the legacy platform, please inspect its repository as well as the archived web resources here, here and here.

For integrating Eqivo in your projects, please refer to https://eqivo.org as well as to rtckit/eqivo-sandbox. If you want to contribute or to extend this project, keep reading.


Eqivo is compatible with PHP 8.1+ and has several extension dependencies, typically bundled with PHP's core. Please refer to [composer.json](composer.json) for details.

Static Analysis

In order to ensure high code quality, Eqivo uses PHPStan:

composer phpstan

and Psalm:

composer psalm


Unit tests are presently lacking, yet they're [stubbed out](tests) for future development. The project itself has been scaffolded against an acceptance test suite hosted in its own repository.



MIT License


  • Plivo framework - Original framework; Eqivo and its authors are not affiliated with the legacy open source project nor with with the company behind it
  • ReactPHP - Provides the asynchronous I/O fabric on top of which Eqivo interacts with FreeSWITCH and the consuming applications
  • FreeSWITCH - Handles the real time communications aspects, particularly signalling and media processing
  • Slate is responsible for rendering the project's website
  • widdershins translates the OpenApi spec to Markdown


Bug reports (and small patches) can be submitted via the issue tracker. Forking the repository and submitting a Pull Request is preferred for substantial patches. For more details, please head to [CONTRIBUTING.md](CONTRIBUTING.md).

*Note that all licence references and agreements mentioned in the Eqivo README section above are relevant to that project's source code only.