What are some alternatives?
Okta - Enterprise-grade identity management for all your apps, users & devices
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.
OneLogin - On-demand SSO, directory integration, user provisioning and more
Keycloak - Open Source Identity and Access Management for modern Applications and Services.
Atlassian Crowd - Crowd is a single sign-on and user identity solution.
LoginRadius - Loginradius is a cloud-based customer identity and access management platform. LoginRadius empowers businesses to deliver a delightful customer experience without compromising security.