WordPress SSO and identity covers more ground than a single login plugin: which protocol to use, whether a plugin covers your case, and what real identity requirements (multi-app SSO, custom 2FA, multi-step verification) look like once they exceed what a stock plugin does.
What is WordPress SSO, and which protocol do you need?
WordPress SSO means logging in once and having that authentication trusted elsewhere, either by an external identity provider or by WordPress acting as the provider itself. SAML fits traditional enterprise identity providers (Okta, Azure AD, OneLogin); OAuth 2.0 and OpenID Connect fit modern, web-native providers and social logins. Which one you need depends entirely on what your identity provider (or the systems you’re connecting) actually speaks.
SAML for enterprise identity providers
SAML 2.0 makes WordPress a service provider to an enterprise IdP: the IdP authenticates the user and sends back a signed assertion, WordPress validates it and maps IdP groups to WordPress roles.
See WordPress SAML SSO for how that connection works with Okta, Azure AD, and OneLogin.
OAuth 2.0 and OpenID Connect
The modern, web-native alternative to SAML, and usually the right fit when connecting to SaaS providers or social logins rather than a traditional enterprise IdP.
See WordPress OAuth and OpenID Connect SSO for when to use it instead of SAML.
Two-factor authentication
Stock 2FA plugins cover the standard case (authenticator app codes, basic SMS) well. Custom verification logic becomes necessary once you need specific code behavior, abuse prevention rules a plugin doesn’t expose, or independence from a metered third-party service.
See two-factor authentication for WordPress for when that line gets crossed.
Identity verification
Beyond login: confirming an applicant actually is who they claim to be, through progressive steps, for platforms where that matters (financial services, regulated industries).
See identity verification for WordPress platforms for how multi-step verification is designed.
Single sign-on across connected apps
The flagship case: WordPress as the identity provider for an entire platform, where one login unlocks every connected application instead of authenticating WordPress alone.
See single sign-on across connected apps for the pattern 84EM built for an AI platform.
Plugin vs custom
A stock SSO or 2FA plugin is the right call when your requirements fit its assumptions: one IdP, standard claim mapping, generic verification rules. Custom work becomes necessary once you need multiple IdPs, non-standard claim or role logic, verification rules a plugin’s settings panel doesn’t expose, or SSO that extends beyond WordPress into other connected applications. None of that means the plugin approach is wrong, it means your requirements have grown past what a generic tool assumes.
How 84EM builds it
84EM has built custom SSO and identity systems across each of these categories: multi-app single sign-on, custom two-factor verification, and multi-step identity verification for a regulated financial platform. See identity and access solutions to talk about what your platform needs.
