Duo Security

Duo Security is a cybersecurity company selling identity and access management (IAM) and multi-factor authentication (MFA) for businesses. Its website presents the product as Cisco Duo and covers workforce access, single sign-on, passwordless login and device trust. The service is used by teams from growing startups to established enterprises.

What Duo Security does

• Phishing-resistant MFA: multi-factor authentication designed to block phishing, with no extra hardware needed.
• Full IAM: identity and access management as a complete solution.
• Secure access brokering: securing access from identity sources a business already uses.
• Single sign-on and passwordless login: sign-in options for workforce access.
• Agentic IAM: zero trust controls extended to AI agents as well as people.
• Identity intelligence: Cisco Identity Intelligence shows who is logging in and what is risky.

Who it works with

Teams of every size, with separate small business and enterprise offers.

Key facts

• Deployment: phishing-resistant MFA with no extra hardware required
• Directory: Duo Directory, for managing identities