Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.
Duo Security - Duo Security provides cloud-based two-factor authentication. Duo’s technology can be deployed to protect users, data, and applications from breaches, credential theft, and account takeover.
Firebase Authentication - Application and Data, Application Utilities, and User Management and Authentication
Ping Identity - Ping Identity provides cloud-based, single sign-on and identity management solutions with their SAML SSO.
OmniAuth - OmniAuth is a flexible authentication system utilizing Rack middleware.
Idaptive Next-Gen Access - Idaptive delivers Next-Gen Access through a zero trust approach. Idaptive secures access everywhere with single sign-on, adaptive MFA, EMM and analytics.