Features: Device synchronization, modern user-interface and backups. The main advantages are the browser extensions that enable one-tap authentication and no need to switch between devices. Token import available from: Google authenticator, Aegis, Raivo OTP and LastPass.
Official website 2fas.com
Our take
2FAS earns its place with the browser-extension trick: one tap on the desktop instead of grabbing your phone and squinting at a six-digit code. It is open source and cross-platform, though leaning on browser extensions and device sync adds a little more moving machinery than a stripped-down offline app. Choose it if the desktop one-tap convenience genuinely fits your day; if you would rather keep everything offline on one device, a simpler app suits you better.
GitHub at a glance
twofas/2fas-android
Stars
1,468
+ 0 this week
Last commit
3mo ago
healthy
License
GPL-3.0
Latest release
5.5.3
3mo ago
Stars, last 10d
Listed in
2FAS alternatives
Aegis Authenticator Aegis Authenticator: Encryption, Organization and Backups for Android
ente Authenticator Features: End-to-end encrypted cloud backups and multi device synchronization. Offline mode and import & export tokens. It's the only open-source solution that is available for…
Tofu Tofu: Easy-to-use and designed specifically for iOS
Raivo OTP Unlisted for now because Raivo was sold, and the new owner wasn't able to clarify concerns listed in the GitHub discussion. The warning will be removed once the situation is…
2FAS license, in plain English
GPL-3.0 Strong copyleft
Free to use and modify, but anything you distribute that is built on it must also be open under the same license.
Permits
- Commercial use
- Modification
- Distribution
- Patent use
- Private use
Requires
- Disclose source
- Same license
- State changes
- License and copyright notice
Does not provide
- Liability cover
- Warranty
Why it matters: Strong copyleft keeps every distributed version open. A vendor cannot fold this into a closed product and ship it without releasing their changes.
Plain-language summary of the project's license, not legal advice. Read the full text for the exact terms.