Clerk | Authentication and User Management

# Clerk > The most comprehensive User Management Platform. Clerk is a complete suite of embeddable UIs, flexible APIs, and admin dashboards to authenticate and manage your users. ## Product - [User Authentication](https://clerk.com/user-authentication): Powerful options to securely authenticate and manage your users - [<SignIn /> component](https://clerk.com/components/sign-in): A production-ready sign-in component with secure authentication, social login, and OTP verification - [<SignUp /> component](https://clerk.com/components/sign-up): A production-ready sign-up component with secure authentication, social login, and OTP verification - [<UserButton /> component](https://clerk.com/components/user-button): A production-ready user button component with account management and multi-session support - [<UserProfile /> component](https://clerk.com/components/user-profile): A production-ready user profile component that centralizes profile, security, connected accounts, billing, and API keys. - [B2B Authentication](https://clerk.com/organizations): Add-on features built specifically for B2B applications - [Billing](https://clerk.com/billing): The easiest way to implement subscriptions for applications - [Pricing](https://clerk.com/pricing): Plans, pricing, and feature comparison for Clerk - [Theme Editor](https://clerk.com/components/theme-editor): Customize Clerk component appearance with a visual theme editor ## Solutions - [React Authentication](https://clerk.com/react-authentication): Embeddable prebuilt UI components for quick and seamless integrations - [Next.js Authentication](https://clerk.com/nextjs-authentication): The fastest and most seamless authentication solution for Next.js - [Expo Authentication](https://clerk.com/expo-authentication): Implement cross-platform authentication the React way - [Authentication for AI](https://clerk.com/ai-authentication): Authentication and abuse protection tailored to AI applications ## Blog - [Postmortem: C