What is Clerk?

Clerk streamlines adding advanced user authentication and management to apps for developers and businesses. Offering pre-built components for secure logins, authentication, and user profile management, it enhances user experience and data security. Supporting frameworks like React and Next.js, Clerk enables quick integration of features like sign-up, sign-in, and multi-factor authentication, bypassing the need to build from scratch.

Clerk features

Pixel-perfect UIs, embedded in minutes

Simply add <SignIn/>, <SignUp/>, <UserButton/>, <UserProfile/> for complete user management functionality. Match to your brand with any CSS library, then deploy to your own domain — no more jarring redirects!

Everything you need for authentication

Ever feel like authentication requirements change with the season? Clerk keeps up with the latest trends and security best practices.

Seamless SDKs for modern frameworks

Clerk keeps developer experience front-and-center by providing helpful SDKs for most modern frameworks on web and mobile.

Integrations with the tools you love

Leverage Clerk as the source of truth for your user data and seamlessly integrate with the tools that you already depend on.

The easy solution to multi-tenancy

Clerk has all the features you need to onboard and manage the users and organizations of your multi-tenant SaaS application.

Trusted by startups and the world's largest companies

Join the growing number of customers and champions who trust Clerk for authentication and user management.