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Joomla! vs Backdrop CMS: catalog facts
Joomla!	Backdrop CMS
Free Free and open source under the GPL-2.0 or later license.	Free Free and open source under the GPL-2.0 licence.
Self-hosted	Web, Self-hosted
Built-in multilingual support Multi-user permission levels	Built-in upgrade path from Drupal 7 Add-ons install from inside the site
Requires a PHP and database server Administration can feel complex for small sites	Requires PHP and MySQL hosting Add-on selection is narrower than larger CMS ecosystems
Self-hosted	Self-hosted
Open source	Open source
License: GPL-2.0	License: GPL-2.0
No account needed	Not stated if an account is needed
Not stated if it works offline	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.