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Authenticator vs 2FAS: catalog facts
Authenticator	2FAS
Free Free and open source under the GPL 3.0 or later.	Free Free and open source. Some components are source-available.
Linux	Android, iOS, Browser extension
Supports both TOTP and HOTP codes Fits in with the GNOME desktop	Browser extension approves codes on the phone instead of typing them Encrypted backups to your own iCloud or Google Drive account
Built for Linux desktops only Codes live on the desktop rather than on a phone you carry	Mobile-first; there is no standalone desktop app Push approval needs the browser extension installed on each machine
Downloadable app	Downloadable app, Browser extension
Open source	Open source
License: GPL-3.0-or-later	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.