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OTPClient vs Google Authenticator: catalog facts
OTPClient	Google Authenticator
Free Free and open source under the GPL-3.0 license.	Free Free to download and use.
Linux, Command line	Android, iOS
Multiple encrypted token databases Supports TOTP, HOTP and Steam Guard codes	Generates codes without a network connection Optional sync of codes across devices via a Google Account
Desktop Linux only, no mobile app Handles one-time codes only, not passwords	Cloud sync ties your codes to a Google Account Not open source
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	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.