GitHub Enterprise has existed for a while: https://docs.github.com/en/enterprise-server@3.20/admin/overview/about-github-enterprise-server https://docs.github.c

GitHub Enterprise has existed for a while: https://docs.github.com/en/enterprise-server@3.20/admin/overview/about-github-enterprise-server https://docs.github.com/en/enterprise-server@3.20/admin/over... I'm pretty sure it still does - I used it at a previous job and at somewhere that I interviewed recently they said they used GitHub (given their size and being a somewhat regulated industry I can't imagine they rely on github.com).