Multi-factor Authentication and Single Sign-On | Duo Security

Protect your employees and user data from cybersecurity risks with multi-factor authentication (MFA), two-factor authentication, and single sign-on solutions.

About Duo: People-first, strong data security

At Duo, we put people first—whether it’s protecting user data for the 40,000+ customers who use our cybersecurity protections or supporting the people who work every day to make our products effective, user-centric, and intuitive. We don’t thrive in fear, uncertainty, and doubt; we build secure access solutions you can trust.

What makes Duo different

From Duo’s easy-to-use multi-factor authentication (MFA) to risk-based authentication that prevents MFA attacks, Duo offers best-in-class zero-trust tools.

Our data security features meet the needs of users for simple and powerful secure access. Fewer barriers means users are more likely to adopt cybersecurity best practices, creating a safer digital world for everyone!

Duo was named the best two-factor authentication (2FA) app by The New York Times Wirecutter! Learn why they chose Duo Mobile and how we can help protect your account.

• We protect you and your users

Duo supports any user and any device, whether company-owned or BYOD (bring your own device). We also integrate seamlessly with on-premises and cloud applications!

• Just the right fit for your cybersecurity needs

Duo grows with your business! Our flexible and scalable tools provide authentication methods for all your user needs.

• Faster than a hacker

With fast deployment and an easy-to-use product that users can quickly adopt, Duo can help you quickly respond to evolving threats.

• Easy to use

Users love the simple way Duo enrolls and authenticates. Administrators appreciate how easy it is to deploy Duo and manage our powerful tools.