Duo

Duo Security provides cloud-based identity security and access management solutions, now operating as part of Cisco. Its core product, Duo, delivers multi-factor authentication (MFA) to verify user identities before granting access to applications and networks. The platform also offers device trust and endpoint visibility, checking the health and security posture of devices attempting to connect. IT and security teams at organizations of all sizes use Duo to enforce adaptive access policies, reducing the risk of credential theft and unauthorized access. The service integrates with a wide range of applications, VPNs, and cloud services, supporting zero-trust security frameworks through single sign-on (SSO) and risk-based authentication controls.