List of free user-management stuff for developerππ½
If you're looking for all programming tools around user-management (not just free). Check this page List of user-management Programming Tools
Kinde
Simple, powerful authentication you can integrate with your product in minutes.
Tag: authentication, user-management
Up to 7,500 MAU per month SSO with unlimited social connections and MFA Basic role and permission management View and manage users Unlimited team members 2,000 machine to machine tokens

Clerk
Authentication and user management for developers that's simple, secure, and scalable with any platform or language. Try it free!
Tag: authentication, user-management
No credit card required 10,000 monthly active users Pre-built components Custom Domain
Auth0
Auth0 is an easy to implement, adaptable authentication and authorization platform.
Tag: user-management, authentication
Up to 7,000 active users and unlimited logins