C1 CMS
Content management system built on the Microsoft .NET stack, distributed as open source.
c1.orckestra.com/repositorydocsplugins
C1 CMS is a content management system written in C# and built on the Microsoft stack. It runs on ASP.NET with the .NET Framework on Windows, stores content in XML flat files by default or in a Microsoft SQL Server database, and offers the C1 Console as its administrative interface. Developers create CMS Functions with Razor, ASP.NET User Controls, XSLT or SQL. The installation guide installs it with the Web Platform Installer and runs it in WebMatrix, and the Azure documentation describes hosting one or more websites on Microsoft Azure or a Windows Server. Orckestra A/S maintains the software, which is available under the Mozilla Public License 1.1 or a commercial license, and the company also offers it as a fully managed service.
Worth knowing
The license amends Section 11 so that disputes involving Orckestra A/S fall under Danish law and the Copenhagen City Court. The system requirements and the installation guide name .NET Framework 4.7.1 and Visual Studio 2017.
Identity
Rendering and deploy
Releases
Adoption
Sources
- 2026-10-24: links
c1.orckestra.com/ - 2026-10-24: links, Written in, GitHub stars
api.github.com/repos/Orckestra/C1-CMS-Foundation - 2026-10-24: links
docs.c1.orckestra.com/Getting-started/Guide - 2026-10-24: Maintainer, License, License model
raw.githubusercontent.com/Orckestra/C1-CMS-Foundation/dev/license.txt - 2026-10-24: Categories, Admin interface
raw.githubusercontent.com/Orckestra/C1-CMS-Foundation/dev/README.md - 2026-10-24: Runtime, Minimum runtime, Databases, Content storage
docs.c1.orckestra.com/Getting-started/System-Requirements - 2026-10-24: Install with
docs.c1.orckestra.com/Getting-started/Guide/Installation-and-Setup - 2026-10-24: Install with
c1.orckestra.com/Download - 2026-10-24: License
c1.orckestra.com/Two-licenses - 2026-10-24: Templating
docs.c1.orckestra.com/Functions - 2026-10-24: First release, Current major version, Last release
api.github.com/repos/Orckestra/C1-CMS-Foundation/releases - 2026-10-24: Contributors
api.github.com/repos/Orckestra/C1-CMS-Foundation/contributors?per_page=1 - 2026-10-24: links
c1.orckestra.com/Add-ons