Clerk | Authentication and User Management
The easiest way to add authentication and user management to your application. Purpose-built for React, Next.js, Remix, and “The Modern Web”.
Categories:
Clerk is a complete authentication and user management platform designed for developers building modern web and mobile applications with frameworks like React and Next.js.
🚀 Overview
Clerk provides developers with pre-built, customizable UI components, APIs, and dashboards to handle all aspects of user authentication, profiles, organizations, and billing securely and scalably.
It solves the complex, ever-changing challenges of building and maintaining custom authentication systems, which often consume significant development time and introduce security risks. By offering ready-to-use solutions, Clerk allows teams to ship faster and focus on their unique value proposition.
Clerk is built for startups, indie makers, and fast-growing companies worldwide. It was created to empower frontend developers to handle full-stack user management effortlessly, as evidenced by its adoption by companies like Vercel, Stripe, and Supabase.
✨ Key Features
- Prebuilt React components for authentication (<SignUp/>, <SignIn/>, <UserButton/>), user profiles, organizations (<OrganizationSwitcher/>), and billing
- Advanced security including MFA, 20+ social providers, bot/ML fraud detection, session revocation, SOC 2 Type 2 compliance
- B2B/Organization management with custom roles, permissions, invitations, and domain-based auto-join
- Integrated billing (beta) for subscriptions, gated content, unified user/org data
- Upcoming/experimental: API Keys (beta), MCP Server for secure app access
🛠 Tech Stack
- Frontend: React-based UI components, compatible with Next.js, Remix, Tailwind CSS
- Backend: REST APIs, Webhooks; SDKs for Node.js, Python, Go, PHP, Ruby
- Database: Fully managed by Clerk (PostgreSQL-like scalability)
- Auth: Clerk's proprietary system with OAuth, JWTs
- Hosting: Clerk cloud (high availability, global edge)
👥 Who Is This For?
This project is useful for:
- Developers who want to implement secure auth and user management in minutes
- Teams looking for scalable B2B features like organizations and roles
- Indie makers building SaaS products with billing and multi-tenancy
📸 Screenshots / Demo
- Live demo: https://dashboard.clerk.com/sign-up (free signup), https://clerk.com/docs/components/overview
- GitHub: https://github.com/clerkinc
🔥 Project Status
- 🟢 Actively building
Last updated: 2026-03-24
❓ FAQ
Is this project free?
Freemium — Free Hobby plan forever up to 50,000 Monthly Retained Users (MRU) and 100 Monthly Retained Orgs (MRO), no credit card required. Pro plan from $25/mo + usage-based overages.
(Explain briefly.)
Is the source code available?
Yes — SDKs, UI components, and examples on https://github.com/clerkinc Core backend APIs are proprietary SaaS.
Can I contribute?
Yes — File issues, submit PRs to SDK repositories, or share feedback via GitHub Discussions, Discord community, or support tickets.
📬 Contact & Links
- Website: https://clerk.com
- GitHub: https://github.com/clerkinc
- Twitter/X: https://x.com/clerk
- Email: support@clerk.dev
Built with ❤️ and kept warm on WarmIndex.
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