Clerk

Go beyond simple sign-in with a complete user management platform built for modern frameworks like React and Next.js. You can launch faster by embedding pixel-perfect, customizable UI components for everything from user authentication to complex organization management. This allows you to add features in minutes, not months.

The system provides a full-stack solution that handles the entire session lifecycle securely. Key features include:

• Comprehensive Security: Multifactor authentication, active device monitoring, social sign-on (SSO), and advanced fraud/bot detection are built-in.
• Multi-tenancy for SaaS: Easily manage organizations with custom roles, permissions, invitations, and domain-based auto-joining.
• Subscription Billing: Drop in React components to define plans, manage subscriptions, and gate access to content without writing payment code.

With dedicated SDKs and a focus on developer experience, you can integrate a robust, enterprise-ready user management system and stay focused on building your core business.