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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 alternatives to Upsource are: GitLab and Roomote.
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.
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.
Source-available, self-hosted AI coding agent that connects to your repo, tools, and chat to investigate issues and open reviewable PRs on your own infrastructure.

Roomote is a self-hosted, source-available AI coding agent built for engineering teams that want autonomous coding work without handing their code, prompts, or data to a vendor's black box. It connects to the tools your team already uses and returns reviewable pull requests through your normal review workflow.
Unlike IDE-based tools like Cline or local agents, Roomote runs in the cloud on your own infrastructure. You assign it work from Slack, an issue tracker, GitHub, or the web. It investigates, plans, and ships changes, then opens a PR your team can read end to end. You keep full control of what merges.
What it can do:
Roomate uses OpenCode as its underlying harness, which keeps it token-efficient compared to first-party vendor agents.
Every prompt, decision path, and line of the agent is in the repository. You can read it, fork it, and adapt it for your team's needs. The license lets you self-host, modify, and redistribute it for internal use, education, and professional services. Competing commercial products built on top of it are the main restriction.
It's a practical fit for engineering leaders who want model choice and deployment control, and for solo developers who want a cloud agent they own and can run cheaply on open-weight models. Non-engineering teammates can also assign work through familiar interfaces without any local setup.
Managed Open Source software hosting in the EU: secure, compliant, fast.
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