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

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