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2FAS vs Authy: catalog facts
2FAS	Authy
Free Free and open source. Some components are source-available.	Free Free to use for consumers.
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	Encrypted backup and multi-device sync, which many authenticators lack
Mobile-first; there is no standalone desktop app Push approval needs the browser extension installed on each machine	Desktop applications were retired; only mobile is supported Account recovery is tied to a phone number, which is a known attack surface
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 22, 2026

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