More than authentication, Complete User Management

Clerk is a developer-first authentication and user management platform offering secure, scalable, and customizable solutions. With drop-in UI components, multifactor authentication, fraud prevention, and organization management, Clerk helps teams build secure apps faster while maintaining full control over user data and experience.

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.

Features

• Drop-In UI Components: Easily embed sign-up, sign-in, user profiles, and billing interfaces with full customization.
• Multifactor Authentication: Enforce secure access with self-serve MFA options and session lifecycle management.
• Fraud Prevention: Block disposable emails and detect bots to reduce abuse and spam sign-ups.
• Organization Management: Enable users to create and manage organizations, switch accounts, and handle billing.
• Social Sign-On & Magic Links: Boost conversion with 20+ SSO options and frictionless login experiences.