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Concrete CMS vs Silverstripe CMS: catalog facts
Concrete CMS	Silverstripe CMS
Free Free and open source under the MIT licence.	Free Free and open source under the BSD-3-Clause licence.
Self-hosted	Self-hosted
Permissive MIT licence Long-running project with legacy branches available	CMS and MVC application framework in one package Permissive BSD licence
Needs a PHP server and Composer to install Older concrete5 sites need upgrading to reach version 9	Needs developer work to build custom sites Requires your own server to run
Self-hosted	Self-hosted
Open source	Open source
License: MIT	License: BSD-3-Clause
Not stated if an account is 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.