Apps similar to Burrow.io include Fossorial Pangolin, which is open source with a free version. Other options are tunnl.gg, Vercel, Serveo and ngrok. You're spoiled for choice with Localhost Tunnel Services like Burrow.io: we list more than 25 alternatives for Linux, Mac, Windows, self-hosting and the web.
Local tunneling made easy. Instantly and easily share your local web server on the Internet with a public URL via SSH tunneling — zero installation, no signup, instant setup, and seamless operation behind NAT or firewall.
Loophole allows you to make your Web application public without actually deploying on a cloud service. It providess a user-friendly domain that you can share with your remote users/friends/teammates to try/use your WebApp.
Germany
EU