Alternatives to Duo mobile for all platforms with any license

Authy

Authy is a simple way to manage two-factor authentication accounts. Authy supports Gmail, Dropbox, LastPass and thousands of other sites.

Free Personal Mac Windows Linux Android iPhone ... Android Tablet iPad Chrome
Two factor authentication One Time Passwords Free Cloud Sync Multiple Account support ... SSH Add a feature

113 Like
FreeOTP

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

Free Open Source Android iPhone Android Tablet iPad
Two factor authentication Community based Multiple Account support Add a feature

38 Like
Google Authenticator

Google Authenticator generates 2-step verification codes on your phone. Enable 2-step verification to protect your account from hijacking by adding another layer of...

Free Android iPhone Blackberry Android Tablet iPad ... Android Wear Wordpress
Multiple Account support One Time Passwords Add a feature

47 Like
WinAuth

WinAuth is a portable, open-source Authenticator for Windows that can be used as a 2FA including Bitcoin / crypto-currency websites, any service that requires the Google...

Free Open Source Windows
Multiple Account support Portable Two factor authentication Add a feature

21 Like
UNLOQ

Simple & secure multi-factor authentication, transaction authorisation and data encryption service. Integrates in minutes. UNLOQ any web, desktop or mobile app....

Freemium Mac OS X Windows Linux Android iPhone ... Wordpress Magento Community Edition
AES encryption Encrypted backups Live Push Notifications Mobile friendly ... Multi-Factor Authentication (MFA) One Time Passwords Push notifications authentication Two factor authentication Add a feature

23 Like
LastPass Authenticator

LastPass Authenticator offers a unique one-tap password verification experience that no other authenticator app delivers.

Free Android iPhone
Cloud sync Multiple Account support Add a feature

4 Like
Authenticator Plus

Authenticator Plus generates 2-step verification codes and lets you synchronize your accounts.

Commercial Android iPhone Android Tablet iPad Apple Watch ... Android Wear
Two factor authentication Add a feature

3 Like
Microsoft Authenticator

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

Free Android iPhone Windows Phone iPad
Multiple Account support Two factor authentication Add a feature

3 Like
Open Authenticator

A trusted open-source Authenticator. Formerly known as SmartWatch2 Authenticator free.

Free Open Source Android
Two factor authentication Add a feature

3 Like
- Discontinued It has been removed from the Play Store
Authenticator

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...

Free Open Source iPhone
Two factor authentication Add a feature

2 Like
SAASPASS

SAASPASS is an Authenticator, Password Manager and a repository for Secure notes. It also secures access to computers such as Macs and Win with two-factor...

Free Android iPhone Blackberry Android Tablet iPad ... Blackberry 10 Apple Watch Android Wear
Two factor authentication Disk Cloning Google Authenticator Multi-Factor Authentication (MFA) ... Single Sign-On Two factor authentication Add a feature

4 Like
QuickAuth

Get your one time codes from your Pebble! Just add your keys using the configuration page and use two-step authentication without the Google Authenticator application...

Free Pebble
Two factor authentication Add a feature

1 Like
CryptoPhoto

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...

Free Windows Windows Mobile Android iPhone Blackberry ... Windows S Android Tablet Windows Phone iPad Blackberry 10 Apple Watch Android Wear
Multiple Account support Portable Two factor authentication Add a feature

3 Like
OTP Auth

The app for calculating one-time-passwords on iPhone and iPad. OTP Auth can be used with any service that uses one time passwords. This includes services like Dropbox...

Free iPhone iPad Apple Watch
Two factor authentication Add a feature

1 Like
HDE OTP Generator

HDE OTP Generator is a virtual device application for multi-factor authentication (MFA), so-called two-step verification, which generates time-based one-time passwords...

Free iPhone
No features added Add a feature

1 Like