Apps similar to Duo mobile include Aegis Authenticator, which is free and open source. Other options are Proton Authenticator, 2FA Authenticator (2FAS), Authy and Stratum. Authenticators like Duo mobile are a crowded field, with more than 50 alternatives for iPhone, Android, iPad, Mac and Linux.
Clockode is a minimal, and offline-only TOTP code generator that stores your authentication secrets in an encrypted local vault, keeping your two-factor codes private and accessible without needing an internet connection.
Authman helps you manage your 2-step authentication tokens on iOS, Android and desktop, and securely sync them between devices.
United States
Two-factor authentication app for Yandex accounts and also other QR-code based temporary codes for two-factor authentication
Russia
CryptoPhoto gives you a fast and safe way to log into your favorite participating web sites while enjoying leading-edge protection against phishing, malware attacks, and scamming.
Australia
Secure your Zoho Account with easy-to-use, multi-factor authentication. Because hackers won't give you a second chance.
India
Calculates time- and counter-based one-time passwords on iOS devices, supports QR code import, iPad interface, Notification Center widget, encrypted iCloud sync, Safari extension, Touch ID and password protection, no ads, and does not collect personal data.
Germany
EU
Secures accounts with encrypted 2FA and MFA code generation, multi-device synchronization, import/export support, breach alerts, password management, biometric and PIN protection, Apple Watch access, Home Screen widget, organizational folders, and custom icons.
Location-based behavioral biometrics SDK and APIs for frictionless mobile identification verification and authentication.
United States
Authenticator Plus generates 2-step verification codes to protect your accounts with your password and phone / tablet.
Authenticator is a simple, free, and open source two-factor authentication app. It helps keep your online accounts secure by generating unique one-time passwords, which you use in combination with your other passwords to log into supporting websites.
