Duo Cisco Duo Single Sign-On vs league/oauth2-server: side-by-side comparison (2026)

Duo Cisco Duo Single Sign-On: SSO solution for centralized authentication and access management. Built by Duo Security.

league/oauth2-server: A PHP OAuth 2.0 authorization server implementation with support for various grants and RFCs.

The table above shows where their features, integrations, deployment and company size fit differ.

Duo Cisco Duo Single Sign-On is made by Duo Security. league/oauth2-server is open-source with 6,618 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Often, yes. Duo Cisco Duo Single Sign-On and league/oauth2-server are both Access Management products. Key differences: Duo Cisco Duo Single Sign-On is Commercial while league/oauth2-server is Free, league/oauth2-server is open-source. Use the table above to see where features, deployment and company size fit differ.