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Umbraco vs Silverstripe CMS: catalog facts
Umbraco	Silverstripe CMS
Free The CMS is free and open source under the MIT licence.	Free Free and open source under the BSD-3-Clause licence.
Self-hosted	Self-hosted
Built on modern .NET and ASP.NET Core Editor-friendly backoffice	CMS and MVC application framework in one package Permissive BSD licence
Requires .NET development skills to build sites Marketing focuses on enterprise and sales-led services	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.