Azure AD SAML vs OIDC: Which Protocol Should Your SaaS Use?

SAML 2.0 and OpenID Connect (OIDC) are two protocols supported by Microsoft Entra ID (formerly Azure AD) for federated login, each with its distinct advantages and use cases. SAML, an OASIS standard since 2005, uses signed XML assertions, making it a preferred choice for server-rendered web applications and enterprises that require IdP-initiated single sign-on (SSO). In contrast, OIDC, which builds on OAuth 2.0 and has been around since 2014, employs signed JWT ID tokens, making it more suitable for single-page applications (SPAs), mobile apps, and API-first products due to its compact token format and modern architecture compatibility. Despite OIDC’s advantages for newer applications, many enterprises still favor SAML due to their established identity catalogs and security protocols. Solutions like SSOJet bridge the gap by enabling the use of both protocols within a single integration, allowing businesses to cater to diverse client requirements without overhauling their authentication systems.

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