Tailscale is a networking company founded in 2019 and based in Toronto.
Users install Tailscale on their computers, phones and servers and sign in, and the devices join a private network built on WireGuard. Each device can reach the others securely from anywhere, without opening ports or setting up a traditional VPN server. People use it to reach a home server, a NAS or a work machine while away. Features include exit nodes, MagicDNS, file sharing between devices and access rules.
The personal plan is free. Paid plans add more users and business controls.