Kallithea is a free software source code management system supporting two leading version control systems, Mercurial and Git. Developed by Software Freedom Conservancy
License: Open Source
GitLab is a comprehensive DevOps platform that offers extensive CI/CD capabilities, making it suitable for larger teams and complex projects. On the other hand, Kallithea is a lightweight self-hosted solution ideal for small teams or individual developers looking for simplicity and ease of use.