Cisco Duo, a part of Cisco Systems, is a leading provider of multi-factor authentication (MFA), secure access, and zero trust security solutions. Cisco Duo specializes in protecting organizations by verifying the identity of users and the health of their devices before granting access to applications. Their platform delivers adaptive authentication, device visibility, policy-based controls, and robust reporting, serving enterprises across sectors with cloud-native security tools that simplify regulatory compliance, enhance user productivity, and defend against credential-based attacks.