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Microsoft Authenticator vs Duo Mobile: catalog facts
Microsoft Authenticator	Duo Mobile
Free Free app from Microsoft for Android and iOS.	Free The app is free. The Duo service behind it is a paid product for organisations.
Android, iOS	Android, iOS
Passwordless sign-in for Microsoft and work accounts Commonly required by employers using Microsoft sign-in	Verified Push defeats the push-fatigue attacks that plague plain approvals Also works as an ordinary TOTP authenticator for other accounts
Mobile only, with no desktop app Most useful inside the Microsoft account ecosystem	Built around a Duo deployment that an organisation pays for Closed source
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	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 23, 2026	Official website Full listing and sources Checked September 22, 2026

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