Gitea
This product is listed as “Self-hosted & Open Source”, which is why it does not necessarily have to be European.
Gitea is an open-source version control software that focuses on being lightweight and fast.
Other products in category Version control services
"GitLab by Stackhero" is a managed GitLab service from France provided by Stackhero. GitLab is an open source version control service including issues, wikis, pages and CI/CD pipelines.
Codeberg is a version control service for open-source projects from Germany. It is built with the open-source version control software Forgejo.