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URL: https://clerk.com/

⇱ Clerk | Authentication and User Management

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Clerk raises $50m Series C
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More than authentication, Complete User Management

Need more than sign-in? Clerk gives you full stack auth and user management — so you can launch faster, scale easier, and stay focused on building your business.

Clerk Components

Pixel-perfect UIs, embedded in minutes

Drop-in UI components for authentication, profile management, organization management, and billing. Match to your brand with any CSS library, then deploy to your own domain.

Explore all components

Add user <SignUp/> and <SignIn/>, provide account access through a dropdown menu, and manage profile and security settings.

Cameron Walker
cameron.walker@gmail.com
Manage Account
Sign out
Cameron Walker
cameron@work.com
CW
Cameron Walker
cameron@personal.com
Add account
Sign out of all accounts
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Account

Manage your account info.

Profile

Security

Billing

API keys

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Profile details

Profile

Cameron Walker

Update profile

Email Addresses

cameron@personal.com

Add email address

Phone number

+1 (555) 123-4567

Add phone number

Connected accounts

Google

·

example@gmail.com

Connect account

Create Organization

Upload

Recommended size 1:1, up to 10MB.

Organization name
my-org
Create organization
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Billed annually
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Test Organization
Test Organization
Member
Manage
Personal account
Clerk App
Admin
Create organization
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Organization

Manage your organization

General

Members

Billing

API keys

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General details

Organization profile

Clerk Sample Apps

Update profile

Verified domains

Add domain

Allow users to join the organization automatically or request to join based on a verified email domain.

Leave organization

Leave organization

Delete organization

Delete organization

Choose an account

Select the account with which you wish to continue.

Personal account
Clerk App
Admin
Clerk Sample Apps
Admin
Request to join
Clerk Sample Apps
Admin
Join
Create organization
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User authentication

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.

Explore user authentication

Multifactor Authentication

Each user's self-serve multifactor settings are enforced automatically during sign-in.

Fraud and Abuse Prevention

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.

Advanced security

Clerk is SOC 2 type 2 compliant and CCPA compliant. We conduct regular third-party audits and penetration tests.

Session Management

Clerk manages the full session lifecycle, including critical security functionality like active device monitoring and session revocation.

Social Sign-On

Add high-conversion Social Sign-on (SSO) to your application in minutes. 20+ options and growing.

Bot Detection

Dramatically reduce fraudulent sign-ups with built-in, continually updated machine learning.

Email and SMS one-time passcodes

Fast and reliable one-time passcode delivery with built-in brute force prevention.

Magic Links

Improve sign-up conversion rates and filter out spam/fraud with Magic Links.

Passwords

Simple and secure password authentication, complete with breach detection and recovery options.

API Keys

Give every user secure, production-ready API keys without
building any of the underlying boilerplate code or UI.

MCP Server

Add secure, consent-driven access to your app with Clerk's MCP Server, all backed by Clerk's authentication and authorization.

B2B Authentication

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.

Explore B2B features

Custom roles and permissions

Powerful primitives to fully customize your app's authorization story.

Auto-join

Let your users discover and join organizations based on their email domain.

Invitations

Fuel your application's growth by making it simple for your customers to invite their team.

Organization UI Components

Clerk's UI components add turn-key simplicity to complex Organization management tasks.

Billing

Subscription billing, without the headache

Add subscriptions to your B2C or B2B application without having to write payment code, custom UI, or wrangle webhooks. Just drop in React components and start earning recurring revenue.

Here’s what you can do out of the box:

  • Define and manage plans
  • Unify user and subscription data
  • Gate access to content
Explore Billing features
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Free 365-day trial, no credit-card required.
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$5.00
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Frameworks

Build with SDKs for modern frameworks

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

All frameworks

Integrations

Integrate with the tools you love

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

All integrations

Trusted around the world

Join the customers and champions who trust Clerk. Free for your first 50,000 monthly retained users and 100 monthly retained orgs.

Start building for free

Clerk's integration gives Supabase developers another incredible option for handling authentication. And the Clerk team are a pleasure to work with.

The best practices built-in to their <SignIn /> and <UserButton /> components would take months to implement in-house, yet no sacrifice is made in terms of Enterprise extensibility or customization to your brand.

We're big admirers of what the @clerk team are building and looking forward to working more closely with them.