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.

doid

WordPress Passwordless SingleSignOn with our <a href="https://onboardingidentity.com/" rel="nofollow ugc">SAML Passwordless Single Sign On Plugin</a> allows access without the need to type in account and password. The functionality is available to access WordPress console and a sample page for end user identification is available too. 
All you need is to scan a QR code which is valid one time only, and has a very limited time to live; super secure, super easy – no configuration needed.
The companion app for mobile is available for <a href="https://play.google.com/store/apps/details?id=com.onboardingidentity.onid" rel="nofollow ugc">Android</a> or <a href="https://apps.apple.com/app/onboardingidentity/id6738704920" rel="nofollow ugc">iOS</a>
<h3>External services</h3>
This plugin connects to an API to obtain an OTP in a QRcode shape, it’s needed to login to the admin console.
It does NOT send any user info, nor system info, to the external service. It just receive the email address of the user who acquired the QRcode through a dedicated mobile app on smartphone. 
This service is provided by an ‘onboardingIdentity’ subsidiary: terms of use, privacy policy are available on <a href="https://onboardingidentity.com/aaa/support.html" rel="nofollow ugc">support</a> and <a href="https://onboardingidentity.com/aaa/service.html" rel="nofollow ugc">service</a>.

onID SSO by SAML 2.0

WordPress Passwordless login just by scanning a one time QR code; no configuration needed. For admin console and end users too, of course.

SSO Login – Universal (OAuth + SAML) vs onID SSO by SAML 2.0