SAML vs OIDC vs OAuth: The 60-Second B2B Playbook

This post is a practical 60-second playbook for B2B SaaS engineers explaining the differences and coexistence of SAML, OIDC, and OAuth: OAuth for authorization, OIDC for authentication (built on OAuth), and SAML as the legacy enterprise SSO standard. It covers token formats, transports, discovery and key rotation, session/logout challenges, SCIM provisioning, common security pitfalls, migration paths, and recommends either implementing all three protocols plus SCIM or using an identity broker like SSOJet to avoid long integration projects.