Clerk

Clerk's SDK for adding authentication to Expo and React Native apps.

Authentication and user management SDK with environment variable configuration for sign-in flows, API keys, and framework integrations.

Authentication and multi-tenancy UI components for multiple frameworks.

Share styles across Clerk components or apply individually using the appearance property.

Backend API for managing user accounts, metadata, and authentication identifiers programmatically.

User authentication service with email, phone, password, passkeys, SSO, and MFA options.

Recurring subscription billing for B2C and B2B SaaS applications, powered by Stripe payment processing.

Multi-tenant organization management with roles, permissions, and member grouping for B2B apps.

Build custom waitlist pages for your application with Clerk SDKs.

Add secure, beautiful, and fast authentication to Next.js with Clerk.

Guides to connect Clerk with databases, platforms, frameworks and analytics tools.

Built-in security protections against credential stuffing, brute force, XSS, CSRF, and other common authentication threats.

Clerk User Management: Welcome to Clerk Docs Clerk provides full-stack authentication and user management with products such as Organizations, Billing, and more.

Clerk JavaScript SDK: Welcome to Clerk Docs Clerk provides full-stack authentication and user management with products such as Organizations, Billing, and more.

React SDK for Clerk with an appearance prop to share styles across Clerk components.