The simple, flexible and friendly ASP.NET CMS used by more than 400.000 websites
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Umbraco CMS

The friendliest, most flexible and fastest growing ASP.NET CMS, and used by more than 443,000 websites worldwide:


Umbraco CMS

Umbraco is a free open source Content Management System built on the ASP.NET platform. Our mission is to help you deliver delightful digital experiences by making Umbraco friendly, simpler and social.

Watch an introduction video


Umbraco - The Friendly CMS

For the first time on the Microsoft platform, there is a free user- and developer-friendly CMS that makes it quick and easy to create websites - and a breeze to build complex web applications. Umbraco has award-winning integration capabilities and supports ASP.NET MVC or Web Forms, including User and Custom Controls, right out of the box.

Umbraco is not only loved by developers, but is a content editor's dream. Enjoy intuitive editing tools, media management, responsive views, and approval workflows to send your content live.

Used by more than 443,000 active websites including Carlsberg, Segway, Amazon and Heinz and The Official ASP.NET and IIS.NET website from Microsoft ( /, you can be sure that the technology is proven, stable and scalable. Backed by the team at Umbraco HQ, and supported by a dedicated community of over 220,000 craftspeople globally, you can trust that Umbraco is a safe choice and is here to stay.

To view more examples, please visit

Why Open Source?

As an Open Source platform, Umbraco is more than just a CMS. We are transparent with our roadmap for future versions, our incremental sprint planning notes are publicly accessible, and community contributions and packages are available for all to use.

Trying out Umbraco CMS

Umbraco Cloud is the easiest and fastest way to use Umbraco yet, with full support for all your custom .NET code and integrations. You're up and running in less than a minute, and your life will be made easier with automated upgrades and a built-in deployment engine. We offer a free 14-day trial, no credit card needed.

If you want to DIY, you can download Umbraco either as a ZIP file or via NuGet. It's the same version of Umbraco CMS that powers Umbraco Cloud, but you'll need to find a place to host it yourself, and handling deployments and upgrades will be all up to you.


Our friendly community is available 24/7 at the community hub we call "Our Umbraco". Our Umbraco features forums for questions and answers, documentation, downloadable plugins for Umbraco, and a rich collection of community resources.

Contribute to Umbraco

Umbraco is contribution-focused and community-driven. If you want to contribute back to Umbraco, please check out our guide to contributing.

Found a bug?

Another way you can contribute to Umbraco is by providing issue reports. For information on how to submit an issue report, refer to our online guide for reporting issues.

You can comment and report issues on the github issue tracker. Since September 2018, the old issue tracker is in read-only mode, but can still be found at