What is phpBB used for?

phpBB is a long-running open-source bulletin board system written in PHP, used to run online discussion forums. It is a good fit for running a community discussion forum and extending forum software with custom extensions.

Is phpBB open source?

Yes. phpBB is open source under the GPL-2.0 licence. Its source code is on GitHub at phpbb/phpbb and is written mainly in PHP.

Yes. phpBB is open source, so the software itself is free to use.

Can I self-host phpBB?

Yes. phpBB can be self-hosted on your own server or infrastructure.

What is phpBB an alternative to?

phpBB is an open-source alternative to Vanilla, XenForo, vBulletin and Invision Community. Other open-source alternatives to Vanilla include Flarum, Simple Machines Forum and Discourse.

Is phpBB actively maintained?

Yes. The most recent commit to phpBB was on 2 October 2026. The project has 2.1k stars on GitHub.

phpBB: open-source alternative to Vanilla, XenForo

About phpBB

phpBB is a free, open-source bulletin board written in PHP, used to run online discussion forums. The repository is the project's development home and also holds the history of version 2. It is licensed under GNU General Public License v2, and the community site phpBB.com is the place to get a copy, find support and discuss development.

The README is aimed at contributors. It asks them to create an account on phpBB.com, open a ticket if none exists, read the coding and Git contribution guidelines and send a pull request. To run a development build from the repository rather than a pre-built package, you fork the project, clone it and install dependencies, with Vagrant and GitHub Codespaces setups documented as alternatives.

Development documentation covers core, extensions and automated testing. Unit and functional tests guard against regressions, run through continuous integration, and the master branch holds the latest development version while the 3.3.x branch carries development of that release series. Topics tag it as a forum and bulletin board project written in PHP.

Key features

Bulletin board forum software in PHP
Extension system documented for developers
Unit and functional test suites
Vagrant and Codespaces development setups
Active 3.3.x and master branches

Good fit for

→Running a community discussion forum
→Extending forum software with custom extensions

Built with: PHP
Tags: forum; bulletin-board; php; phpbb; community; self-hosted; discussion; open-source

phpBB: questions and answers

What is phpBB used for?: phpBB is a long-running open-source bulletin board system written in PHP, used to run online discussion forums. It is a good fit for running a community discussion forum and extending forum software with custom extensions.
Is phpBB open source?: Yes. phpBB is open source under the GPL-2.0 licence. Its source code is on GitHub at phpbb/phpbb and is written mainly in PHP.
Is phpBB free?: Yes. phpBB is open source, so the software itself is free to use.
Can I self-host phpBB?: Yes. phpBB can be self-hosted on your own server or infrastructure.
What is phpBB an alternative to?: phpBB is an open-source alternative to Vanilla, XenForo, vBulletin and Invision Community. Other open-source alternatives to Vanilla include Flarum, Simple Machines Forum and Discourse.
Is phpBB actively maintained?: Yes. The most recent commit to phpBB was on 2 October 2026. The project has 2.1k stars on GitHub.