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MODX Revolution vs Concrete CMS: catalog facts
MODX Revolution	Concrete CMS
Free Free and open source under the GPL-2.0 licence.	Free Free and open source under the MIT licence.
Self-hosted	Self-hosted
Full control over HTML output and design Supports multi-language and multi-domain sites	Permissive MIT licence Long-running project with legacy branches available
Requires PHP hosting and some setup Smaller community than the largest PHP CMSes	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: GPL-2.0	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.