Need more than just a sign-in box? Clerk is a complete suite of embeddable UIs, flexible APIs, and admin dashboards to authenticate and manage your users.
Trusted by fast-growing companies around the world
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!
Ever feel like authentication requirements change with the season? Clerk keeps up with the latest trends and security best practices.
Each user's self-serve multifactor settings are enforced automatically during sign-in.
Reduce fraudulent sign-ups and free trial abuse by blocking high-risk disposable email domains and restricting the use of email subaddresses with the “+” separator.
Clerk is SOC 2 type 2 certified and CCPA compliant. We conduct regular third-party audits and penetration tests.
Clerk manages the full session lifecycle, including critical security functionality like active device monitoring and session revocation.
Add high-conversion Social Sign-on (SSO) to your application in minutes. 20+ options and growing.
Dramatically reduce fraudulent sign-ups with built-in, continually updated machine learning.
Fast and reliable one-time passcode delivery with built-in brute force prevention.
Improve sign-up conversion rates and filter out spam/fraud with Magic Links.
Simple and secure password authentication, complete with breach detection and recovery options.
Seamless SDKs for modern frameworks
Clerk keeps developer experience front-and-center by providing helpful SDKs for most modern frameworks on web and mobile.
All frameworksIntegrations 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.
All integrationsThe 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.
Learn more about Clerk B2BPowerful primitives to fully customize your app's authorization story.
Let your users discover and join organizations based on their email domain.
Fuel your application's growth by making it simple for your customers to invite their team.
Clerk's UI components add turn-key simplicity to complex Organization management tasks.
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.
The best practices built-in to their <SignIn/> and <UserProfile/> components would take months to implement in-house, yet no sacrifice is made in terms of Enterprise extensibility or customization to your brand.
Clerk feels like the first time I booted my computer with an SSD. It’s so much faster and simpler that it changed how I do things.
After spending many hours on auth issues that seemed simple (but were not), we moved to Clerk and all that burden was lifted. We kind of wish we’d made that decision earlier.
Clerk let us spin up a new product in hours instead of weeks. As a company that deeply values developer velocity— Clerk is exactly what we needed.
We’re big admirers of what the @ClerkDev team are building and looking forward to working more closely with them.
Clerk’s integration gives Supabase developers another incredible option for handling authentication. And the Clerk team are a pleasure to work with.
We were able to ship MFA, SSO, and SAML for our customers in a fraction of the time. Now, we have improved security and must-haves for enterprise prospects.
Managed to integrate AppSync with @ClerkDev over the weekend. Implementing a Lambda authorizer with Clerk’s Go SDK was super easy.
Start now, no strings attached
Integrate complete user management in minutes. Free for your first 10,000 monthly active users and 100 monthly active orgs. No credit card required.
