The best open source alternative to Upsource is Gitea. If that doesn't suit you, we've compiled a ranked list of other open source Upsource alternatives to help you find a suitable replacement. Other interesting open source alternative to Upsource is GitLab.
Upsource alternatives are mainly Git Platforms but may also be Project Management Suites or CI/CD Platforms. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Upsource.
A lightweight, fast, and customizable Git service that simplifies code hosting and collaboration for teams of all sizes.

Gitea is a powerful, open-source Git service that puts you in control of your code. With its intuitive interface and robust features, Gitea makes version control and collaboration effortless for developers and teams.
Key benefits of Gitea include:
Whether you're an individual developer, a small team, or a large organization, Gitea provides a flexible and powerful platform for managing your Git repositories and fostering collaboration.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
A comprehensive AI-powered DevSecOps platform that integrates development, security, and operations, streamlining software delivery and enhancing productivity.

GitLab is the leading AI-powered DevSecOps platform, designed to revolutionize software development from planning to production. By integrating essential tools and automating key processes, GitLab empowers teams to build, secure, and deploy software faster and more efficiently.
Key features include:
Main benefits:
GitLab serves over 30 million registered users and is trusted by more than 50% of Fortune 100 companies. Recognized as a Leader by Gartner and Forrester, GitLab offers a complete solution for organizations looking to streamline their DevSecOps processes and deliver software faster without sacrificing security or quality.