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21st.dev

21st.dev

Github + Pinterest to make your AI websites look beautiful

Website 21st.dev
Overview

What it is

21st.dev is the largest React component registry for AI applications, used by 1.4M developers (200K MAU). We provide the building blocks to create AI agents and agent-powered apps: UI components, agent templates, and an SDK with built-in UI, tools, memory, observability, and managed infrastructure.

Intent

I need it when

Find design inspiration and reference implementations for specific UI patterns

The platform organizes components by category (buttons, forms, pricing sections, heroes, etc.) with featured and trending options, enabling designers and developers to discover and adapt proven UI solutions.

Contribute and share custom UI components with the developer community

The platform enables designers and developers to publish their own components to the 21st.dev Community, building reputation and enabling code reuse across projects.

Accelerate React/Next.js development by reusing pre-built UI components

21st.dev provides thousands of community-made React components with Tailwind CSS styling that developers can copy and remix, reducing time spent building common UI patterns from scratch.

Build and ship AI-powered products with pre-integrated developer tools

21st.dev combines UI components with Agents SDK, templates, and MCP tools designed specifically for agentic internet applications, streamlining the full development workflow.

Drop

Not a fit when

  • User needs pre-built, production-ready components without customization or remix capability
  • Project requires non-React or non-Next.js UI frameworks
  • Team lacks familiarity with Tailwind CSS and prefers alternative styling approaches
  • Organization requires commercial support and SLAs for component libraries
  • User needs components for non-web platforms such as mobile native or desktop applications
Commercials

Pricing

Pricing not specified