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MODX Revolution vs Backdrop CMS: catalog facts
MODX Revolution	Backdrop CMS
Free Free and open source under the GPL-2.0 licence.	Free Free and open source under the GPL-2.0 licence.
Self-hosted	Web, Self-hosted
Full control over HTML output and design Supports multi-language and multi-domain sites	Built-in upgrade path from Drupal 7 Add-ons install from inside the site
Requires PHP hosting and some setup Smaller community than the largest PHP CMSes	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.