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OTPClient vs Aegis Authenticator: catalog facts
OTPClient	Aegis Authenticator
Free Free and open source under the GPL-3.0 license.	Free Free and open source under the GPL, with no accounts and no paid tier.
Linux, Command line	Android
Multiple encrypted token databases Supports TOTP, HOTP and Steam Guard codes	The vault is encrypted with AES-256-GCM, unlocked by password with scrypt or by biometrics Automatic backups of the vault to a location you choose, plain or encrypted
Desktop Linux only, no mobile app Handles one-time codes only, not passwords	Android only No cloud sync; you own the backup process
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
No account needed	No account 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 21, 2026

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