[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.