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Authy vs Stratum: catalog facts
Authy	Stratum
Free Free to use for consumers.	Free Free and open source under the GPL 3.0 license.
Android, iOS	Android
Encrypted backup and multi-device sync, which many authenticators lack	Encrypted backups with import from other apps and export at any time Supports TOTP, HOTP and mOTP
Desktop applications were retired; only mobile is supported Account recovery is tied to a phone number, which is a known attack surface	Android only, with no iOS or desktop version Only handles one-time codes, not passwords
Downloadable app	Downloadable app
Closed 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.