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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.

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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.

Learn more about MFA

Image Alt Text User holding their phone and showing the Duo MFA integration options with Google, Dropbox and Slack in the foreground.
Deployable phishing-resistant MFA

Duo makes securing against modern identity attacks simple. With features like proximity verification and Duo Mobile, admins can set up in days and users can get started in minutes.

Learn more about proximity verification
Approved message from Duo that shows the various ways to log in via MFA like Duo Push, Security Key, Phone Call and Touch Unlock.
Customizable setup

Duo’s MFA lets you mix-and-match secure methods like biometrics, passcodes, tokens, and Duo Push, so you can protect users your way.

Discover Duo’s authentication methods
Push notification from Duo to show a low-effort experience with Duo Mobile 2FA and the MFA app.
User-friendly authentication

With Duo’s mobile app, users can verify their identity in just a tap. It’s a smooth, low-effort experience that supports adoption and saves time for everyone.

Explore the Duo Mobile 2FA and MFA app

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.

Download our ebook

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.

Explore Duo's easy integrations
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.

Learn how phishing-resistance works
Get adaptive authentication

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

Learn more about adaptive authentication
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.

Discover user self-service
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.

Go passwordless

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.

Secure every access point

Dive deeper into multi-factor authentication

EBOOK

Multi-Factor Authentication: Buyer’s Evaluation Guide

Read the ebook
Explore all Duo resources
Office buildings and high rises of Denver, Colorado where the City of Denver uses Duo MFA as a critical layer of their security program.

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.

Remote user accesses Duo’s identity authentication app which has been rated Best 2fa app by Wirecutter.
Named best 2FA app by Wirecutter

Duo Mobile has been named the best two-factor authentication (2FA) app by the New York Times Wirecutter. Stay secure and in control with optional backups and onboarding.

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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.

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