Open-source Sitefinity alternatives

Oqtane is an open-source content management system and application framework for building web, mobile, and desktop applications on modern .NET. Its motto is to build applications instead of infrastructure, so teams can concentrate on their own business problems. It is written in C# and released under the MIT license.

The framework is described as rocket fuel for Blazor: it supplies scalable services and a composable UI that can be hosted as static Blazor, Blazor Server, Blazor WebAssembly, or Blazor Hybrid through .NET MAUI. The topics highlight modular architecture and multi-tenancy, which make it suitable for SaaS products and sites with many tenants.

Oqtane acts both as a ready CMS and as a foundation for custom applications, with modules and themes that extend it. It suits .NET developers and agencies who want to deliver content-driven sites or business applications with a consistent Blazor-based stack.

Sulu is an open-source PHP content management system built on the Symfony framework. It is meant for robust multilingual and multi-portal websites, and it provides an administration interface for managing the whole content lifecycle that can be extended by developers.

This repository holds the core framework that implements the CMS functionality and is a dependency of every Sulu project. To start a new site, developers use the sulu/skeleton project template, and the Sulu organization on GitHub lists official bundles for extending existing projects. Documentation covers installation and usage, and community help is offered through Slack and GitHub Discussions.

The project is community-driven and backed by partner companies, with a transparent development process. It is written in PHP, licensed under MIT and runs on your own hosting. It suits PHP and Symfony agencies and teams building custom content-heavy sites that need flexibility beyond what an off-the-shelf blogging CMS gives.

TYPO3 is an open-source, PHP-based content management system released under the GNU GPL. It was created by Kasper Skårhøj and is developed today by a community of contributors and the TYPO3 Core Development Team. This repository is a synchronized mirror of the core packages, which are reviewed on the project's own code review system.

It describes itself as a content management framework, meaning the streamlined core is separated from optional extensions, and an open API lets developers extend both the website frontend and the administration backend. Many ready-made extensions are available, or you can write your own. TYPO3 runs on web servers such as Apache, nginx or IIS, on Linux, Windows, FreeBSD and macOS, and uses a database such as MySQL.

The backend is accessed through a supported browser, and the installation guide explains how to set up a basic installation on your server. TYPO3 is self-hosted, with documentation and community resources linked from the README, and it is aimed at agencies and organizations building large, multilingual and customized sites. The repository lists the GPL-2.0 licence.

DNN, formerly known as DotNetNuke, is an open-source web content management platform built for the Microsoft ecosystem. It is used to build commercial websites, social intranets, community portals and partner extranets, and handles dynamic content of many types with sites that are straightforward to deploy and update.

Built-in features include a single installation with multi-site capability, file and folder management, localization with six languages out of the box, customizable site templates and themes, Azure compatibility, many REST APIs for site and content management, a drag-and-drop interface with an in-place rich-text editor, and administration tools such as security roles, protected content, SEO, a scheduler, SSL support and taxonomy. It is extensible through custom modules, with third-party extensions and skins available in the DNN Store.

DNN is written in C# and licensed under MIT, and runs on your own Windows and .NET hosting. The project has a community website, forums, documentation and a contribution process with a versioning policy and release schedule. It suits organizations and developers who already work in the Microsoft stack and want a mature open-source CMS.

Concrete CMS is an open-source content management system written in PHP and built by contributors from around the world. It was previously known as concrete5, which explains the older names that still appear in repositories and projects.

This repository covers Concrete CMS 9.0 and later; concrete5 8.x and 5.7.x live in separate branches and older 5.6 releases in a legacy repository. To work from source you clone the repository and install third-party dependencies with Composer. Documentation is maintained on a dedicated site that community members can edit after logging in with their community account.

The software is licensed under MIT and runs on your own PHP hosting, with forums and a contributor guide for those who want to get involved. Topics also describe it as a framework that developers can build on.