Clerk

About Clerk

Clerk provides authentication and user management for web and mobile applications, delivered through pre-built, embeddable UI components for sign-up, sign-in, user profile management, and organization management. These components support CSS-based customization and can be deployed on a developer's own domain.

The platform supports both individual user authentication and B2B use cases, including organization creation, account switching, membership management, and invitations. Authentication features include multifactor authentication, social sign-on with 20+ provider options, magic links, email and SMS one-time passcodes, password authentication with breach detection, and API key management for end users.

Additional security capabilities include session management with active device monitoring and session revocation, bot detection using machine learning, and fraud/abuse prevention that blocks disposable email domains and restricts email subaddressing. Clerk also includes billing components, such as a pricing table display and subscription management embedded in the user profile and organization profile interfaces. The company states it is SOC 2 Type 2 and CCPA compliant and undergoes regular third-party audits and penetration testing.

Key features

• Drop-in UI components for sign-in, sign-up, user profile, and organization management
• Multifactor authentication enforced automatically during sign-in
• Social Sign-On with 20+ providers
• Fraud and abuse prevention with bot detection and disposable email blocking
• Session management with active device monitoring and session revocation
• Built-in billing components with pricing tables and subscription management

Frequently asked questions