Clerk

Security Series C (opens in a new tab) clerk.com (opens in a new tab) · in/clerkinc (opens in a new tab) · @clerk (opens in a new tab)

Clerk sells authentication and user management for apps: sign-in, multi-factor authentication, organizations and roles, enterprise SSO, billing and authentication for agents. It is bought by developers and companies building web and mobile apps, especially B2B SaaS, with SDKs for Next.js, React and Expo.