React UI Library Statistics for 2026 (Data-Backed)

Choosing a React UI library is easier with data. Here are the key metrics for the major libraries as of mid-2026. Numbers are approximate — check the original sources for current figures.

GitHub stars and npm downloads

• MUI: around 93K stars, around 3.5M weekly npm downloads
• shadcn/ui: around 65K stars (not an npm package — copy-paste model)
• Chakra UI: around 38K stars, around 1.1M weekly npm downloads
• Radix UI: around 35K stars, around 2.8M weekly npm downloads (primitives)
• DaisyUI: around 35K stars, around 700K weekly npm downloads
• Mantine: around 28K stars, around 900K weekly npm downloads
• Headless UI: around 25K stars, around 3.2M weekly npm downloads
• HeroUI/NextUI: around 22K stars, around 400K weekly npm downloads
• Ninna UI: growing, early stage

Component counts

• MUI: 100+ components (including X-tier data grid, date pickers)
• Mantine: 100+ components + 50+ hooks
• shadcn/ui: 50+ components (copy-paste, you choose what to include)
• Chakra UI: 50+ components
• Ninna UI: 67 components + 54 blocks (full-page UI patterns)
• DaisyUI: 30+ component classes (CSS-only)
• Radix UI: 25+ primitives (headless)
• Headless UI: 15+ primitives (headless)

Bundle size (gzipped, single component)

Bundle size depends heavily on what you import and your bundler's tree-shaking. These are approximate figures for importing a single Button component:

• DaisyUI: 0 KB JS (CSS-only, styles are in your CSS bundle)
• Headless UI: around 3-5 KB (headless, minimal JS)
• Radix UI: around 5-8 KB per primitive
• Ninna UI: around 3-6 KB per package (tree-shakeable, CSS in separate file)
• shadcn/ui: varies (you own the source, depends on your implementation)
• MUI: around 20-30 KB (Emotion runtime + component)
• Mantine: around 15-25 KB (CSS Modules + component)
• Chakra UI: around 15-20 KB (Emotion + styled-system)

Theming model

• CSS-first (no JS runtime): DaisyUI, Ninna UI, shadcn/ui
• CSS-in-JS (JS provider): MUI (Emotion), Chakra UI (Emotion), Mantine (CSS Modules + provider)
• Headless (you style): Radix UI, Headless UI

Accessibility testing

• Ninna UI: 708 vitest-axe tests across 51 files in CI
• Radix UI: extensive accessibility testing (foundation for shadcn, Ninna UI)
• MUI: accessibility tested, Material Design compliance
• Mantine: accessibility tested
• Others: varies, not always automated in CI

How to use this data

Don't choose a library by star count alone. A library with fewer stars but better alignment with your stack (Tailwind v4, CSS-first, tree-shakeable) may be the better choice. Use this data to narrow your shortlist, then build the same small feature in two candidates to compare DX.