21st.dev
Open-source React/Tailwind component library. Copy-paste modern, animated components directly into your project.
Strengths
- Visually polished components with animations, well beyond basic shadcn
- Magic MCP: generates UI components directly in your IDE via prompt
- Built on shadcn/ui + Tailwind, compatible with existing stacks
Limitations
- Less exhaustive catalog than shadcn, missing complex components (tables, data grids)
Best for
- Landing pages, marketing sections with polished animations
- Developers who want to move fast without sacrificing visual quality