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Flarum vs MyBB: catalog facts
Flarum	MyBB
Free Free and open source under the MIT licence.	Free Free and open source under the LGPL-3.0 licence, supported by donations.
Self-hosted	Self-hosted
Large ecosystem of community extensions Group permissions and built-in moderation	Large catalogue of plugins and themes Built-in template and theme editor
Needs a PHP server to host Version 2.0 is still a release candidate	Traditional bulletin board design rather than a modern chat-style forum Needs a PHP web server you maintain yourself
Self-hosted	Self-hosted
Open source	Open source
License: MIT	License: LGPL-3.0
No account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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