Clerk

Clerk provides a simple way to add authentication and user management to applications, with a focus on React, Next.js, Remix, and modern web development. The platform offers a range of features, including full-stack authentication, user management, and drop-in UI components. Clerk has raised $50m in Series C funding and is trusted by fast-growing companies worldwide. The platform offers a free plan for up to 50K users, with paid plans starting at $0/mo. Clerk's pricing is designed to scale with businesses, supporting unlimited applications.