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Duo Mobile vs Aegis Authenticator: catalog facts
Duo Mobile	Aegis Authenticator
Free The app is free. The Duo service behind it is a paid product for organisations.	Free Free and open source under the GPL, with no accounts and no paid tier.
Android, iOS	Android
Verified Push defeats the push-fatigue attacks that plague plain approvals Also works as an ordinary TOTP authenticator for other accounts	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
Built around a Duo deployment that an organisation pays for Closed source	Android only No cloud sync; you own the backup process
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
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 21, 2026

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