Clerk
Add authentication, user management, and organization features to React, Next.js, and modern web apps with embeddable UI components and flexible APIs.
Complete authentication solution designed specifically for modern web frameworks like React, Next.js, and Remix. Simply drop in pre-built components like <SignIn/>, <SignUp/>, and <UserProfile/> to get pixel-perfect authentication UI that matches your brand.
Advanced security features include multifactor authentication, fraud prevention, bot detection, and SOC 2 Type 2 compliance. The platform automatically handles session management, device monitoring, and breach detection to keep your users safe.
Social sign-on support for 20+ providers, magic links, SMS/email passcodes, and traditional password authentication. Built-in fraud prevention blocks disposable emails and suspicious sign-ups using machine learning.
B2B SaaS ready with organization management, custom roles and permissions, team invitations, and auto-join features based on email domains. Perfect for multi-tenant applications that need enterprise-grade user management.
Developer-friendly SDKs for popular frameworks with comprehensive documentation. Integrates seamlessly with existing tools and provides flexible APIs for custom implementations.
Free tier includes 10,000 monthly active users and 100 organizations - no credit card required to get started.