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Contao vs Concrete CMS: catalog facts
Contao	Concrete CMS
Free Free and open source under the LGPL-3.0 license.	Free Free and open source under the MIT licence.
Self-hosted	Self-hosted
Multiple sites and languages in one installation Four years of support for LTS versions	Permissive MIT licence Long-running project with legacy branches available
Smaller international community than the largest CMSs Requires a PHP server to host	Needs a PHP server and Composer to install Older concrete5 sites need upgrading to reach version 9
Self-hosted	Self-hosted
Open source	Open source
License: LGPL-3.0	License: MIT
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.