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Phishing-resistant MFA

Multi-factor authentication (MFA) is a secure, user-friendly way to protect access by requiring two or more identity verification factors to log in. With Cisco Duo, phishing-resistant MFA is simple to deploy and helps stop phishing attacks, malware, and ransomware in their tracks.

Not all MFA is created equal

Duo delivers strong security without the hassle. It integrates easily, offers phishing-resistant-MFA in addition to options like biometrics and tokens, and includes user-friendly identity verification. That means a smoother experience for users and less work for IT support.

Get more from your MFA

Many solutions just meet the minimum—leaving you with hidden costs, complex deployments, and frustrated users. You shouldn’t have to settle.

Download our free eBook to find an MFA solution that fits your organization, streamlines security, and gets out of the way.

Duo's eBook for the Multi-factor Authentication Buyer's Evaluation Guide being held by a person in an office.

MFA that meets you where you are

Duo wraps your entire organization in protection with powerful, scalable tools that work anywhere and grow with you.

MFA integration

Duo works seamlessly with the tools your team already uses, from major platforms to custom apps. Quick to set up, easy to manage, and doesn’t require extra IT support.

Scale phishing-resistant MFA as you grow

Duo supports your growth, not just your current infrastructure. Add new users or apps anytime and stay protected without slowing down your systems.

Get Adaptive Authentication

Duo’s adaptive authentication lets you set access policies based on content like user role, location, application, network, and device health.

Setup that clicks

Duo takes the hassle out of setup. It works with your existing systems, including applications and devices, and users can enroll themselves in just a few clicks.

Skip on passwords, not on safety

Say goodbye to repeat prompts. Duo Passwordless keeps sessions secure with a single verification based on a timeframe you choose.

Security that plugs into everything

Duo integrates with any app or platform, whether you’re adding 2FA for compliance or building a zero trust strategy. It supports everything from cloud and on-premises environments to VPNs, SaaS tools, custom apps, and even offline devices.

Our deployment of MFA, with multiple authentication options, helped the city achieve a security mindset, a major culture change. The City and County of Denver rolled out MFA to over 18,000 users in less than three months with minimal impact to our IT help desk. Having a simple mobile app option is crucial to higher user adoption.

Read customer story

Paul Kresser

Chief Data Officer, City & County of Denver

Duo in the news

Trust Radius logo layered over Duo Security’s green brand color.
TrustRadius Buyers Choice

In 2025, Duo earned the TrustRadius Buyer's Choice Award, with 75% of reviewers highlighting its exceptional capabilities, value, and customer relationships.

Ready to secure your organization?

Experience for yourself why Duo is one of the most trusted access management tools. Try it for free, explore editions, and connect with security experts.