Joomla! vs Umbraco: What are the differences?
Developers describe Joomla! as "A content management system helping both novice users and expert developers to create powerful websites and applications". Joomla is a simple and powerful web server application and it requires a server with PHP and either MySQL, PostgreSQL, or SQL Server to run it. On the other hand, Umbraco is detailed as "Open source CMS". It is a friendly open-source Content Management System and is one of the most widely used ASP.NET Content Management Systems. It is free and offers great flexibility and extensive capabilities.
Joomla! and Umbraco can be categorized as "Self-Hosted Blogging / CMS" tools.
Joomla! is an open source tool with 3.29K GitHub stars and 2.88K GitHub forks. Here's a link to Joomla!'s open source repository on GitHub.