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2FAS vs Stratum: catalog facts
2FAS	Stratum
Free Free and open source. Some components are source-available.	Free Free and open source under the GPL 3.0 license.
Android, iOS, Browser extension	Android
Browser extension approves codes on the phone instead of typing them Encrypted backups to your own iCloud or Google Drive account	Encrypted backups with import from other apps and export at any time Supports TOTP, HOTP and mOTP
Mobile-first; there is no standalone desktop app Push approval needs the browser extension installed on each machine	Android only, with no iOS or desktop version Only handles one-time codes, not passwords
Downloadable app, Browser extension	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	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.