Clerk
Authentication and user management platform for developers, purpose-built for React, Next.js, Remix, and the modern web.
About
Clerk is an authentication and user management platform that provides embeddable UIs, flexible APIs, and admin dashboards for adding auth to applications. Founded in 2019 and headquartered in San Francisco, the company is fully remote with a global team.
Clerk has raised approximately $101M in total funding, including a $50M Series C in 2025 from Menlo Ventures, Anthropic, and Georgian, and a $30M Series B led by CRV with participation from Stripe and Andreessen Horowitz. The platform has a strategic partnership with Stripe for integrated payment and auth workflows.
The product is purpose-built for React, Next.js, Remix, Expo, and TypeScript, with type-safe SDKs and hooks. Clerk maintains an active open-source presence on GitHub and a developer community on Discord.