UI libraries for vibe coding compared

All four install via the shadcn CLI and work with React and Tailwind. shadcn/ui is a free base of primitives. 21st.dev is an open community marketplace of components. Magic UI is open-source animated components. VibeUI is a curated catalog of ready blocks and pages where every item ships an instruction for your AI agent.

Library	Best for
VibeUI	Building a designed site through an AI agent: ready blocks + Copy for AI
shadcn/ui	Base UI elements when you design yourself
21st.dev	Finding varied components from many authors
Magic UI	Animated effects built on Motion