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Yubico Authenticator vs Authy: catalog facts
Yubico Authenticator	Authy
Free The app is free; it requires a YubiKey, which is bought separately.	Free Free to use for consumers.
Windows, macOS, Linux, Android, iOS	Android, iOS
Secrets stay on the hardware key rather than the device Same codes available on any machine where the key is plugged in	Encrypted backup and multi-device sync, which many authenticators lack
Requires a YubiKey Losing the key loses access to the stored codes unless you have a backup	Desktop applications were retired; only mobile is supported Account recovery is tied to a phone number, which is a known attack surface
Downloadable app	Downloadable app
Closed 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 24, 2026	Official website Full listing and sources Checked September 22, 2026

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