Clerk

Full-stack authentication and user management with drop-in UI components.

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About

• Drop-in UI components for auth, user profiles, organization management, and billing — customizable with any CSS library and deployable to custom domains. • Full B2B multi-tenancy with organizations, custom roles/permissions, verified domains, and enterprise SSO connections. • Built-in fraud prevention, MFA enforcement, biometric sign-in (Face ID / Touch ID / Android), machine-to-machine tokens, and SOC 2 Type 2 / HIPAA compliance. Clerk is a complete authentication and user management solution targeting developers building SaaS and consumer apps. It handles the full auth lifecycle — from sign-up flows and social SSO (20+ providers) to session management, organization administration, and subscription billing — so teams can ship faster without building auth infrastructure from scratch.

Who it's for

Full-stack auth & user management for SaaS apps

Price

Hobby is a free forever plan ($0, no credit card). Pro is $25/mo ($20/mo billed annually) and Business is $300/mo ($250/mo billed annually); Enterprise is custom/quote-only. Add-ons cost $100/mo ($85/mo annually).

AI level

Advanced

Key features

Drop-in auth UI componentsSocial SSO (20+ providers)Multi-factor authenticationOrganization multi-tenancyBiometric sign-in (iOS/Android)Machine-to-machine tokensFraud & abuse preventionSubscription billing management

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