A secure tunnel from a public URL to whatever you're running. No config files, no firewall tickets, no deploy.
Site served as a named vhost — myapp.test in Herd or Valet, a container behind nginx? That needs one more flag: local vhosts. Arriving from another tunnel? devgate vs ngrok.
We replaced a VPN, a bastion host, and a wiki page titled ‘how to demo’ with one binary.