Build Professional websites. Smart and budget friendly using Open Source.

Why Composite C1?

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Introducing the Form Builder

Build the web forms you need using drag and drop - mobile friendly, accessible and great looking forms when and where you need it.

Fully functional out of the box  and built with integration, customization and extension in mind. The Form Builder enable professional agencies to tailor the experience to specific customer needs.
Composite C1 Form Builder

Hi!   Marketeers
Ola   Website Builders
Hello!   Agencies

Focus on your content

  • Maintain your company websites without IT involvement
  • Make your website stand out with the SEO assistant
  • Easy multiplatform publishing - mobile and tablets
  • Fully supported and users in 160 countries
Read more about Composite for marketeers
New to Composite C1?
See our getting started videos

"More than 1000 installs every month"

Browse your site and start editing

US agency of the year joins us

The San Francisco and New York-based web agency Questus have joined us as a registered partner.Read more
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Web Designers & Developers rule!

  • Get a head start with starter sites, packages, documentation and samples
  • Enjoy superb html, css, xslt and script control, open to your favorite tools
  • Use ASP.NET Razor, Web Forms, Web API and MVC
  • A super developer friendly and LINQ based data layer included
Read more Composite C1 for Web Designers and Developers.
New to Composite C1?
Read our Getting Started guide
Watch our videos for inspiration

What made Eric Porter go Wow?

»Wow, another Open Source CMS adds support for aspnet razor in a really cool way!« Eric Porter, ASP.NET Team PM

Composite C1 let you combine ASP.NET Razor, end-user UI and data in a seamless way.

Read more

Skins from Twitter Bootstrap

Get a head start on your next design with the cool Twitter Bootstrap templates. The templates are easy to install and use, just use this simple guide our developers put together for you.

Read more

Need a CMS that cover more ground?

  • Budget friendly open source with all the professional trimmings
  • Empower all the Web Designers and .NET Developers in your organization
  • A management UI your customers will buy into
  • A flexible platform that integrate, perform and scale - also on Windows Azure
Read more about why Composite C1 is great for agencies

Work smarter and faster

»The many packages and starter sites makes it possible for us to design, build and deliver great looking websites faster than ever before«.Björn Wikström, CTO, Welcom
Welcom has among other built site and shop for Team Sportia one of the leading players on the Swedish market, with 126 sport stores.

40000 installations in 160 countries

From Australia to USA. With more than 40000 installs and counting Composite C1 is spanning the globe. We now have installs in more than 160 countries and the Composite C1 Console is translated into more than 8 languages.


"A fantastic app/CMS. It has great layering so you don't need to be an expert to start... and then as you build your knowledge can switch to more complex developer's languages like C#. Combine this with MVC, Razor and you have a cutting-edge ready to use platform that is simply a joy to work with." bluemeansgo
"Tried out a few of the CMS applications here, and this seems to kill the rest of them by far! I am working my way through getting C1 Certified! " Altissimo
"It's very strong, nice code, and easy to customize and extend and very fast." likeno_another