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
Atlassian Crowd - Crowd is a single sign-on and user identity solution.
Google Cloud IAM - Google Cloud Identity & Access Management (IAM) lets administrators authorize who can take action on specific resources, giving you full control and visibility to manage cloud resources centrally.
Ping Identity - Ping Identity provides cloud-based, single sign-on and identity management solutions with their SAML SSO.