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Concrete CMS vs Joomla!: catalog facts
Concrete CMS	Joomla!
Free Free and open source under the MIT licence.	Free Free and open source under the GPL-2.0 or later license.
Self-hosted	Self-hosted
Permissive MIT licence Long-running project with legacy branches available	Built-in multilingual support Multi-user permission levels
Needs a PHP server and Composer to install Older concrete5 sites need upgrading to reach version 9	Requires a PHP and database server Administration can feel complex for small sites
Self-hosted	Self-hosted
Open source	Open source
License: MIT	License: GPL-2.0
Not stated if an account is needed	No account 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.