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Yubico Authenticator vs FreeOTP: catalog facts
Yubico Authenticator	FreeOTP
Free The app is free; it requires a YubiKey, which is bought separately.	Free Free and open source.
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	Open source with public repositories for both apps Available on F-Droid as well as Google Play and the App Store
Requires a YubiKey Losing the key loses access to the stored codes unless you have a backup	Mobile only, no desktop app Minimal project website with little documentation
Downloadable app	Downloadable app
Closed source	Open 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 23, 2026

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