Head to head
21st.dev vs shadcn/ui
21st.dev and shadcn/ui solve the same job (Core design stack), so this is a pick-one decision. If cost is the constraint, shadcn/ui clears it without a card.
Quick read
- Free with no card: shadcn/ui.
| Field | 21st.dev21st.dev Not yet swept | shadcn/uiui.shadcn.com Not yet swept |
|---|---|---|
| What it is | 12,000+ React/Tailwind components in native shadcn registry format, plus ~50 community themes, 29,000 searchable icons, shaders and gradients. Every item exposes an AI-ready prompt written specifically for Lovable, Cursor and Claude Code. | 50+ accessible components built on Radix (now Base UI by default) and Tailwind, distributed as source copied into your repo rather than an npm dependency. Also ships Blocks, Charts, a Themes browser, and the registry protocol. 121k stars. |
| Category | Core design stack | Core design stack |
| Cost tier | mixed | free |
| Pricing | Free (2 copies/day) · $6/mo · $15/mo +AI | Free · MIT |
| Why builders pick it | The themes page is the fastest visual win you have. A theme here is a shadcn token set — colors, type, radius. Copy the :root/.dark blocks into index.css and the whole app re-skins with zero component edits. Browse the themes page and pick one that matches the look you are already going for. | This is already your project. The reason it matters strategically: React Bits, 21st.dev, Magic UI, Kokonut and ElevenLabs UI all publish into its registry, so wiring the official shadcn MCP once gives Claude an install path into every one of them. |
| Watch out for | not logged | not logged |
| How to wire it up | npx @21st-dev/magic@latest | npx shadcn@latest mcp init --client claude |
| Editor's pick | Yes | Yes |
Other matchups worth running
Agent endpoint: GET /api/public/compare?slugs=21st-dev,shadcn-ui