Nebula

Defined Networking, Inc

About this app

Nebula is a scalable overlay networking tool with a focus on performance, simplicity and security. It lets you seamlessly connect computers anywhere in the world. It can be used to connect a small number of devices, but is also able to connect tens of thousands of devices.

Nebula incorporates a number of existing concepts like encryption, security groups, certificates, and tunneling, and each of those individual pieces existed before Nebula in various forms. What makes Nebula different to existing offerings is that it brings all of these ideas together, resulting in a sum that is greater than its individual parts.

Nebula is a VPN application built with Android VpnService.

Ratings and reviews

Nebula is truly fantastic, but not at all well publicised. Nebula is an overlay mesh network like Tailscale or Zerotier. The singular difference is that Nebula is fully open source. The application on all all workstation platforms is entirely free of commercial control. This app, not Nebula, does have niggles: you cannot edit any part of the generated config file, including the inbound firewall rules (this means no external logins on android); adding configs is a little clunky.

(2025-02-17, Android 11, App v0.5.1-93) Sadly the app freezes at any important action I tried. I can add a name, show a fresh Pub Key, share it and that's where it ends. No way to Paste or Load the signed key from the CA. Full on freeze. Rest of my Nebula works great and without a hitch.

Awesome functionality, works well, and the devs are responsive to issues on the nebula slack group. Very very occasional hiccups, always resolved by disconnecting and reconnecting the connection.

What’s new

- Allow saving incomplete/invalid sites
- Begin update to Material 3 design