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Ente Auth vs Duo Mobile: catalog facts
Ente Auth	Duo Mobile
Free Free and open source, funded by the company's photo storage product.	Free The app is free. The Duo service behind it is a paid product for organisations.
Windows, macOS, Linux, Android, iOS, Web	Android, iOS
End-to-end encrypted cloud backup at no cost Clients on mobile, desktop and the web, all open source	Verified Push defeats the push-fatigue attacks that plague plain approvals Also works as an ordinary TOTP authenticator for other accounts
Backup relies on an Ente account, even though the data is encrypted	Built around a Duo deployment that an organisation pays for Closed source
Downloadable app, Web application	Downloadable app
Open source	Closed source
License: AGPL-3.0	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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