If you need a powerful user management system that works well with React and Next.js, Clerk is a good option. It includes a full set of embeddable UI components, flexible APIs and detailed admin dashboards. Clerk supports a variety of authentication needs with multifactor authentication, session management and social sign-on. It also supports multi-tenancy with custom roles and permissions, auto-join and invitations.
Another good option is Supabase, an open-source alternative to Firebase that supports Next.js. Supabase includes a Postgres database, powerful user authentication, instant APIs and real-time data synchronization. It also includes built-in storage for large files and vector embeddings for machine learning integrations. Its user management system includes password hashing and support for third-party providers, making it a good option for developers.
If you need something more scalable, Auth0 is a good option. The service offers secure access and control over user permissions through universal login, single sign-on and multifactor authentication. Auth0 supports integration with many frameworks and languages through its extensive SDKs and Quickstarts. It's designed to be flexible and scalable, good for everything from small startups to large enterprises.
If you need a service that handles authentication but also has other features like payment integration, Kobble is worth a look. Kobble supports modern frameworks like Next.js and includes tools for user management and access control. It also includes a no-code authentication portal and supports a variety of OAuth providers, making it easier to get started.