From their FAQ[0]: > Is Tailscale open source? > Mostly. Tailscale daemon client code is open source. Where the operating system is open source, the daemon an

From their FAQ[0]: > Is Tailscale open source? > Mostly. Tailscale daemon client code is open source. Where the operating system is open source, the daemon and GUI are open source, and where the operating system is closed, the daemon is open source and the GUI is closed source. You can run just the tailscaled daemons on Windows, it just wouldn't have a GUI, and that's fully open source[1]. Some more justification from Brad himself. [2] [0] https://tailscale.com/opensource/#:~:text=Is%20Tailscale%20open%20source%3F,the%20GUI%20is%20closed%20source https://tailscale.com/opensource/#:~:text=Is%20Tailscale%20o.... [1] https://news.ycombinator.com/item?id=28901253 https://news.ycombinator.com/item?id=28901253 [2] https://news.ycombinator.com/item?id=32470615 https://news.ycombinator.com/item?id=32470615