Why C1 CMS?

C1 CMS is one of the top rated open source CMS worldwide built on the Microsoft stack. A powerful CMS that won't let you down and won't get in your way. Beside a global community, C1 CMS is backed by a core of passionate digitals located in our offices in Montreal (Canada), Austin (USA) & Copenhagen (Denmark).


An Open Source CMS for Professional websites

With C1 CMS you get the best of both worlds. We offer you a full-fledged feature rich CMS based on the latest Microsoft technology - both as free open source and as a fully licensed, supported and serviced product. This is why C1 CMS is the first choice for many web agencies and professional organizations alike.

An Open Source CMS for Professional websites

Extend with free and professional Add-ons

Out of the box C1 CMS is a fully functional CMS that will allow you to easily publish, manage and organize a wide variety of content. With easy setup, deployment, starter sites and both free and professional add-ons web professionals can build sites with C1 CMS. To meet the online needs of your customers you can fully customize the entire website experience using the skills of web designers and developers.

Extend with free and professional Add-ons

User Experience

C1 CMS is designed with the web professional in mind, no matter what your role is. The end user interface is easy to use and uncomplicated, yet very versatile. You have the core features like instant editing, previewing, SEO optimizing, image management, visual editing etc. readily at hand. Website builders can work with the tools they already love and easily interface with end users in the same friendly way that the CMS do. C1 CMS combine custumization and user friendliness.

User Experience

»Building our webshop on C1 CMS using MVC has been a great experience. Because of the extensibility of C1 CMS, we think it is a great platform for any .NET-based web application. Having a solid CMS as a foundation means a lot of added value for our customer«.

Mikkel Skovby, Senior Developer at Compusytems

»C1 CMS is for me the best .Net CMS on the market because it is built on the latest Microsoft technologies with a strong focus on software quality, is clean structured, has built-in packages for the most common requirements and a very comprehensive documentation, is ready for windows azure and the best of all: it's open source :-)«.

Thorsten Hoffmann, Cologne Cloud Company, Germany

Top rated CMS by the users

Being open source and past more than 60000 installations means that we get a lot of feedback - and our CMS comes highly praised. We have received glowing reviews and are among the five highest ranking Open Source CMS World Wide based on Microsoft technology. C1 CMS power everything from small local businesses to international corporate websites and let web agencies use a single CMS for both small and large projects. All this form a strong community that provide additional support and options.

Top rated CMS by the users

Professional Open Source

Basing your business on open source software means basing it on source code that is freely available to use, adapt and examine. What you install is curated by us - the organization behind C1 CMS - and we ensure the product is safe, fully functional and evolving, just like with any other professional software product. Open source simply means you have a lot more freedom and choice. Besides from the source code you will also find all user guides and developer documentaton freely available online, all in high quality.

Professional Open Source

Cloud ready with Windows Azure from Microsoft

If you need to handle massive traffic, peaks or serve content on a global scale cloud computing is the way to go. With C1 CMS and the Azure Publisher you get a scalable publishing platform that allows you to run your website across one or more of Microsoft's global data centers, giving your customers fast response times across Asia, Europe and the Americas.
Cloud ready with Windows Azure from Microsoft

What's the catch?

We believe in open source and C1 CMS Foundation is uncrippled, downloadable for free and blessed with an active community site. We sell support, product warranty, professional add-ons, training, custom development and easy upgrades. These are all things that ensure the success of a professional project, but not something stopping you from delivering a website on a tight budget. The only catch is that we will always be there for you, should you happen to need our professional services.

What's the catch?

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You are not alone! 
 Check out some of the
60000 installations worldwide