Cisco Duo

Cisco Duo is an identity and access management platform built around phishing-resistant multi-factor authentication that does not require additional hardware tokens. It provides single sign-on for simplified access across applications, passwordless authentication options that remove credential-based vulnerabilities, and device trust checks that ensure only trusted devices reach organizational resources. The platform also includes Duo Directory for centralized identity management and integrates with the broader Cisco Identity Intelligence suite for threat detection and security posture management. Duo offers Essentials, Advantage, and Premier paid editions at $3, $6, and $9 per user per month respectively, plus a free tier for teams of 10 or fewer users, and serves organizations from SMBs to enterprises, government agencies, and MSPs across healthcare, finance, education, legal, retail, and technology.