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Attackers hate us. Users love us.

Easy to use. Incredibly effective. Cisco Duo simplifies identity security for your workforce.

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A happy customer using Cisco Duo's identity and access management security solutions.

One of the world’s most trusted identity security tools

From start-ups to large enterprises, companies of all sizes depend on Cisco Duo to prevent unauthorized access.

The number one billion plus representing the number of monthly user authentications.

Monthly User Authentications

The number of 100K representing the number of customers globally has helped.

Customers Globally

The number of 159 percent representing the return on investment recorded in the Forrester TEI report.

Return on Investment*

*The Total Economic Impact™ of Cisco Duo, a commissioned study conducted by Forrester Consulting, February 2023. Results are based on a composite organization.

Because the last thing your business needs is an identity crisis

Our cloud-based identity security solutions help companies play it safe.

Always keep your guard up

Duo’s Continuous Identity Security safeguards against intricate identity threats 24/7 while maintaining a smooth authentication experience for your entire workforce. 

Learn about Continuous Identity Security

A woman looking at her mobile phone while receiving a Duo Push message about verifying her login attempt.

A Duo biometric image on a browser indicating that someone can use touch ID to successfully login with the correct credentials.

Introducing Duo Passport

Streamline access across applications by minimizing authentication interruptions on trusted devices. Keep things easy for users but tough for intruders. 

See how Duo Passport works

The gold standard in MFA

Stay protected with flexible multi-factor authentication (MFA) including options using FIDO2 for phishing-resistant authentication — hook, line, and no sinker. 

Learn how MFA works 

Duo prompt images on mobile devices asking the user if they're logging in to ensure their identity and secure access.

A person working on their laptop and receiving a successful login notification from Duo.

Get picky with permissions 

Customize who gets access to what and when it's allowed. With adaptive access, you can quickly define granular permissions based on role, location, and device.

Explore adaptive access 

No device left behind 

Keep your circle tight. Verify the trustworthiness of every device that tries to access your applications while simultaneously tracking their health status. 

See how it works 

The Duo Admin dashboard panel providing device insights across operating systems and devices.

Built to fit your business

Get 30 days free. Choose a plan, pay easily with a credit card, and get activated in minutes.

Here's what Duo's devotees are saying

Mark Rodrigue
Senior Network Engineer,
Room & Board

"Our rollout was surprisingly quick,” exclaims Mark Rodrigue, Senior Network Engineer at Room & Board. "The Duo rollout took maybe four weeks from start to finish. All the training and onboarding material was right there. We just downloaded it, added our banner, and sent it to our users."

Headshot of Mike Johnson, former CISO, Lyft

Mike Johnson
former CISO,


"One of those rare solutions that both improves the security of our company while simultaneously being easier for our employees to use.”

Headshot photo of Christopher Martin, Manager of Identity and Access Security, AmeriGas

Christopher Martin
Manager of Identity and Access Security, AmeriGas

"When we roll a technology out to users, we want to enable as much self-service as possible – not generate more help desk calls. This actually enables users – for example, they get a new phone and can easily get it enrolled."