What are some alternatives?
When comparing Amazon Cognito and Google Cloud IAM, you can also consider the following products
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.
Okta - Enterprise-grade identity management for all your apps, users & devices
OneLogin - On-demand SSO, directory integration, user provisioning and more
Atlassian Crowd - Crowd is a single sign-on and user identity solution.
Ping Identity - Ping Identity provides cloud-based, single sign-on and identity management solutions with their SAML SSO.
LoginRadius - Loginradius is a cloud-based customer identity and access management platform. LoginRadius empowers businesses to deliver a delightful customer experience without compromising security.