21st
21st is a developer tools company in San Francisco, United States.
React Components, Templates & Themes — 12,000+ Crafted UI
- Headquarters
- San Francisco, California
- Business Model
- Marketplace
- Website
- 21st.dev
About
21st is a community catalog of UI components, full-page templates, and shadcn themes built by independent design engineers, spanning React components, shaders, and gradients that can be dropped into a project through Cursor, Claude Code, v0, Lovable, or any other AI agent. The registry has been used by 3,511,886 builders, from indie makers to the world's largest product teams, and lets authors publish and sell their own components directly on the platform.
Tech & App Stack
8 technologies & apps tracked
Every product and vendor across these categories, with where each signal came from.
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