Need suggestions on cloud native user management component

Recently, I've been planning to build a cloud application as a side project. Instead of building a User Identity/management component from scratch and not using 3rd party services (Auth0/Amazon Cognito etc.), Is there any opensource project, which is available as a plug-configure-operate module.

I found this very interesting project, which exactly solves my use case: https://github.com/ory/kratos. But, it's in pre-alpha

Any suggestions/alternatives which has user signup/login, self-service like password reset, verify email, social login etc.?