How to add SSO and SAML to my SaaS Product - Part 2

The text is a technical guide on implementing Single Sign-On (SSO) and Security Assertion Markup Language (SAML) for SaaS products, focusing on the decision-making process between SAML and OpenID Connect (OIDC) protocols. It emphasizes the prevalence of SAML in enterprise Request for Proposals (RFPs) and procurement, particularly when dealing with identity providers like Okta, Microsoft Entra ID, and others. The text offers a detailed analysis of when to choose SAML over OIDC, considering factors such as customer identity provider preferences, the need for IdP-initiated SSO, and compliance with industry-specific security requirements. It outlines the technical aspects of SAML, including Service Provider (SP) and Identity Provider (IdP) metadata exchange, assertion handling, and the differences between SP-initiated and IdP-initiated flows. Furthermore, the document advises on implementation options, comparing the build-it-yourself approach with managed authentication services like Clerk, Auth0, and WorkOS, emphasizing factors like speed to production, multi-tenant complexity, pricing, and developer experience. It also highlights the role of SCIM for user provisioning and deprovisioning, explaining its importance for enterprise customers while noting that smaller organizations may initially manage without it.

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