[twistiti]

ZeroTier is an alternative, free up to 100 devices.

[api]

Its free for unlimited devices if you run your own network controller, which is not that hard. Look under controller/ in the github repo.

[Multicomp]

I wonder if Tailscale will offer something similar? I don't know the lift cost to do a 'sharealike' network controller but perhaps if it is not burdening their network more than a line in a DB somewhere, they might be willing to do something similar.

[jonathanoliver]

+1 for ZT. It's been an awesome service.

[ss3000]

ZeroTier is also open-source. If TailScale isn't then I personally wouldn't even consider it a competitor.

[wscott]

As much as I love ZT they actually dropped the GPL license a couple months ago, but they do publish source.

[Nullabillity]

Or Nebula?