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Zero-TOTP vs Aegis Authenticator: catalog facts
Zero-TOTP	Aegis Authenticator
Free Free and open source under the GPL-3.0.	Free Free and open source under the GPL, with no accounts and no paid tier.
Web, Self-hosted	Android
Zero-knowledge encryption of stored TOTP secrets Use the hosted service or self-host it	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
iOS app still in development and CLI only planned Small project with a limited contributor base	Android only No cloud sync; you own the backup process
Web application, Self-hosted	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
Account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 21, 2026

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