🔑 Two Factor Authentication

Google Authenticator is a multifactor app for mobile devices.

free

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

B2B SaaS: Make your app enterprise-ready! Authentication - SAML/OIDC SSO, Directory Sync (SCIM 2.0), Audit Logs, Data Privacy Vault, and more!

Try for free Open Source free $49.0 / Monthly (Per connection)

Duo Security provides cloud-based two-factor authentication. Duo’s technology can be deployed to protect users, data, and applications from breaches, credential theft, and account takeover.

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

Azure Multi-Factor Authentication helps safeguard access to data and applications while meeting user demand for a simple sign-in process.

Aegis Authenticator is a free, secure and open source app to manage your 2-step verification tokens...

Auth0 is a program for people to get authentication and authorization services for their own business use.

Open Source

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

Enterprise-grade identity management for all your apps, users & devices

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

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

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

Open Source

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