GitHub is a developer platform that hosts Git repositories in the cloud and adds tools for the whole software lifecycle. It offers issues and milestones for planning, pull requests for code review, GitHub Actions for automated testing and deployment, package hosting, GitHub Pages for websites and AI-powered assistance through GitHub Copilot. Developers and organisations use it for private and public projects, including open-source collaboration. GitHub is delivered as a hosted service at GitHub.com; the platform itself is proprietary.
GitHub, Inc. is based in San Francisco and has been a subsidiary of Microsoft since 2018, which makes Microsoft a US parent company and a CLOUD Act signal. By default, data on GitHub.com is stored in the United States. Because the platform is proprietary and operated by the vendor, European organisations depend on GitHub and Microsoft for hosting, availability and access to their source code, and should weigh this when code is a strategic asset.