Authress

This plugin upgrades the standard WordPress login forms with one powered by <a href="https://authress.io" rel="nofollow ugc">Authress</a> that enables:
<ul>
<li>Universal authentication
<ul>
<li>Over 40 social login providers</li>
<li>Enterprise connections (SAML, Office 365, Google Apps, and more)</li>
<li>Customer configurable SSO connections</li>
</ul>
</li>
<li>Ultra secure
<ul>
<li>User identity</li>
<li>Security access policies</li>
<li>Mitigate brute force attacks</li>
</ul>
</li>
</ul>
Which includes: 
– Azure AD and B2C 
– Office 365 
– WSO2 
– Ping Identity 
– Okta 
– Auth0 
– Keyclock 
– LinkedIn 
– Salesforce 
– Twitter 
– Google Workspace 
– Yahoo 
– Salesforce 
– Hubspot 
– Steam 
– Slack 
– And any custom OAuth2.1, OpenID, or SAML provider
With SSO Login, you can automatically support business and enterprise customers that have important security requirements for their users to use your site and platform.
<h3>Technical Notes</h3>
By using this plugin you are delegating the site authentication and profile handling to Authress. That means that you won’t need to use the WordPress database to authenticate users and the default WordPress login forms will be upgraded to support the new SSO Login flow.
Please see our <a href="https://authress.io/knowledge-base/" rel="nofollow ugc">knowledge base</a> for more information on how Authress authenticates and manages your users.
<h4>Migrating Existing Users</h4>
Authress allows multiple authentication providers. You can have social providers like Facebook, Twitter, Google+, a database of users and passwords (just like WordPress), or you can use an Enterprise directories like, Office365, Google Apps, SAML, OpenID, OAuth2.1. All those authentication providers are supported and more.
<h3>How to customize this plugin</h3>
This plugin provides extension points to make it easier to configure it exactly as you need. Check out the full docs: 
* <a href="https://github.com/Authress/wordpress-sso-login/blob/main/docs/customizations.md" rel="nofollow ugc">SSO Login customizations</a>

SSO Login – Universal (OAuth + SAML)

SSO Login provides user login, business authentication, SSO, Social login, and Single Sign-On for all sites.

Frontegg

Frontegg SAML SSO replaces the default WordPress login and logout experiences with seamless SAML authentication via <a href="https://frontegg.com" rel="nofollow ugc">Frontegg</a>.
This plugin is designed for modern SaaS and enterprise WordPress environments where you need to enforce login via an external identity provider (IdP).
It includes: 
– 🔐 Secure SAML 2.0 login and logout 
– 📋 Admin-friendly configuration of SSO URLs and certificate 
– 📎 Auto-generated SP (Service Provider) values (Entity ID, ACS URL, SLO URL) 
– 🧭 Redirect control after logout 
– 🔄 Auto-redirects from <code>wp-login.php</code> to Frontegg 
– ✨ Clean and accessible admin UI using native WordPress components
<h3>License</h3>
This plugin is licensed under the GPL v2.0 or later. See LICENSE.txt for details.

Frontegg SAML SSO

Replace the WordPress login and logout flows with secure SAML-based authentication via Frontegg. Easily configure your SSO app from the admin panel.

SSO Login – Universal (OAuth + SAML) vs Frontegg SAML SSO