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Google Authenticator vs OTPClient: catalog facts
Google Authenticator	OTPClient
Free Free to download and use.	Free Free and open source under the GPL-3.0 license.
Android, iOS	Linux, Command line
Generates codes without a network connection Optional sync of codes across devices via a Google Account	Multiple encrypted token databases Supports TOTP, HOTP and Steam Guard codes
Cloud sync ties your codes to a Google Account Not open source	Desktop Linux only, no mobile app Handles one-time codes only, 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
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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