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2FAS vs Microsoft Authenticator: catalog facts
2FAS	Microsoft Authenticator
Free Free and open source. Some components are source-available.	Free Free app from Microsoft for Android and iOS.
Android, iOS, Browser extension	Android, iOS
Browser extension approves codes on the phone instead of typing them Encrypted backups to your own iCloud or Google Drive account	Passwordless sign-in for Microsoft and work accounts Commonly required by employers using Microsoft sign-in
Mobile-first; there is no standalone desktop app Push approval needs the browser extension installed on each machine	Mobile only, with no desktop app Most useful inside the Microsoft account ecosystem
Downloadable app, Browser extension	Downloadable app
Open source	Closed source
License not stated	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 22, 2026	Official website Full listing and sources Checked September 23, 2026

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