More than authentication —
Complete user management
Add sign up, sign in, and profile management to your application in minutes. Theme prebuilt frontends to match your branding, or customize everything with easy to use APIs.
Optimized for React
Everything you need
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.
2-step verification
- Encourage or require a second step during sign in
Single sign-on
- Grant faster access with Google, Facebook, and more
Available passwordless sign-in
- 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
Password breach notifications
- Proactively reset passwords that appear in leaks
Easy-to-use APIs
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.
import { SignedIn, SignedOut, SignIn }from "@clerk/clerk-react";function Dashboard() {return (<main><SignedIn>{/*User is signed in, show dashboard */}</SignedIn><SignedOut>{/* User is signed out, show sign-in flow */}<SignIn /></SignedOut></main>)}
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.
Components
Launch full-featured user management in minutes with our prebuilt UI, designed to maximize throughput and delight your users.
Sign up + sign in flows
Beautiful flows optimized for conversion and customized to your business needs.
// JSX<SignIn /><SignUp />// Vanilla JSwindow.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 JSwindow.Clerk.mountUserProfile(el)
User button
A familiar button for displaying the current user, accessing account settings, and signing out.
// JSX<UserButton />// Vanilla JSwindow.Clerk.mountUserButton(el)
Demo: Deploy in 5 minutes
Watch as we add Clerk to a new Next.js application in just a few minutes.
“It's great to see a service focus on taking away all the pain related to user management—not just login.”
Guillermo Rauch
/CEO, Vercel
“Working on account.php at Facebook was like being in a landmine field, and I love that Clerk’s User Profile solves that.”
Adtiya Agrawal
/Ex-CTO, Dropbox & Early employee, Facebook
Ready to see what Clerk can do for you?Start your free trial today
Start completely free with up to 500 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.
View pricing