Duo mobile Alternatives

Best rated Two-Factor Authentication smartphone app for consumers, simplest 2fa Rest API for developers and a strong authentication platform for the enterprise.

Google Authenticator is a multifactor app for mobile devices.

Open source implementation of the two-factor authentication HOTP and TOTP schemes.

Portable open-source Authenticator for Windows

LastPass is an online password manager and form filler that makes web browsing easier and more secure.

The YubiKey is a one-time password device for secure login with two-factor authentication

andOTP is a two-factor authentication App for Android 4.4+

Login to any account on any device with your fingerprint

One app to quickly and securely verify your identity online, for all of your accounts.

Authenticator is a simple, free, and open source two-factor authentication app.

UNLOQ offers Multi-Factor Authentication, Transaction authorization, and Data Encryption solutions for Businesses and Organisations.

The app for calculating one-time-passwords on iPhone and iPad.