More than authentication

Simple and beautiful
user management

Add sign up, sign in, and profile management to your application in minutes. Theme our prebuilt frontends to match your branding, or customize everything with our APIs.
Get started for free
Clerk authentication and user management - Secure your React or Next.js application in 5 minutes | Product Hunt

Optimized for React

Stop fitting a square peg into a round hole. Clerk is designed from the ground-up to support modern React frontends.

Frontend included

Launch full-featured user management in minutes with our plug-and-play interfaces, designed to maximize throughput and delight your users.

Sign up + sign in

Beautiful flows optimized for conversion and customized to your business needs.

// JSX
<SignIn />
<SignUp />


// Vanilla JS
window.Clerk.mountSignIn(el)
window.Clerk.mountSignUp(el)

User profile

A complete dashboard to empower your users to take control of their account security.

// JSX
<UserProfile />

// Vanilla JS
window.Clerk.mountUserProfile(el)

User button

A familiar button for showing the current user, switching users, and accessing account settings.

// JSX
<UserButton />

// Vanilla JS
window.Clerk.mountUserButton(el)

Demo: Clerk with Next.js

Watch as we add Clerk to a new Next.js application in just 6.5 minutes.

Easy-to-use APIs

import
 SignedIn,
 SignedOut,
 SignIn
} from "@clerk/clerk-react";

function Dashboard() {
  return (
   <main>
      <SignedIn>
        {/* Show the dashboard */}
      </SignedIn>
      <SignedOut>
        {/* Show the Sign In UI */}
       <SignIn />
      </SignedOut>
   </main>
  )
}

We obsess over every detail of our API definition, documentation, and helper libraries to ensure they are intuitive and developer-friendly. Plus, we follow the frontend-first methodology to allow for faster development directly from the client.

See documentation →

The features your users expect

Signing up and signing in are the first interactions users will have with your product. Delight them with the familiar features they have come to expect.

Two-step verification

Encourage or require a second step during sign in

Single sign-on

Grant faster access with Google, Facebook, and more

Available passwordless

Make passwords obsolete by sending one-time password codes

Multi-sessions

Allow users to sign in to multiple accounts at once

New device notifications

Proactively notify users when a new device signs in

Coming soon

Password breach notifications

Proactively reset passwords that appear in leaks

Coming soon

Uncompromising security

From brute force and password leak detection to HTTP-only cookies and CSRF protection — account security is our top priority and we're constantly iterating to better protect against threats.

See the threats we protect against →

Ready to see what Clerk can do for you?

Start completely free for up to 10,000 monthly active users. No credit card required.

Pricing details
Learn more about our transparent per-user costs to estimate how much your company could save by implementing Clerk.