Compare software

Google AuthenticatorYubico Authenticator
Free

Free to download and use.

 Free

The app is free; it requires a YubiKey, which is bought separately.

Android, iOS Windows, macOS, Linux, Android, iOS
  • Generates codes without a network connection
  • Optional sync of codes across devices via a Google Account
  • Secrets stay on the hardware key rather than the device
  • Same codes available on any machine where the key is plugged in
  • Cloud sync ties your codes to a Google Account
  • Not open source
  • Requires a YubiKey
  • Losing the key loses access to the stored codes unless you have a backup
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
Works offline Not stated if it works offline

Checked September 23, 2026

Checked September 24, 2026

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