Auth0 Single Sign On vs Duo Directory: Side-by-Side Comparison (2026)

Auth0 Single Sign On: SSO platform enabling users to authenticate once across multiple applications. built by Auth0. Core capabilities include Universal Login customizable authentication interface, Single Sign On across multiple applications, Single Sign Off session termination..

Duo Directory: IAM solution with user directory, SSO, MFA, and passwordless authentication. built by Duo Security. Core capabilities include User directory with lifecycle management, Single sign-on (SSO), Phishing-resistant multi-factor authentication..

Both serve the Multi-Factor Authentication and Single Sign-On market but differ in approach, feature depth, and target audience.

Auth0 Single Sign On differentiates with Universal Login customizable authentication interface, Single Sign On across multiple applications, Single Sign Off session termination. Duo Directory differentiates with User directory with lifecycle management, Single sign-on (SSO), Phishing-resistant multi-factor authentication.

Auth0 Single Sign On is developed by Auth0. Duo Directory is developed by Duo Security. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

Auth0 Single Sign On and Duo Directory serve similar Multi-Factor Authentication and Single Sign-On use cases: both are Multi-Factor Authentication and Single Sign-On tools, both cover MFA, Single Sign On, Authentication. Review the feature comparison above to determine which fits your requirements.