Radix UI vs Ninna UI
Unstyled, accessible React UI primitives. Compare Radix UI and Ninna UI side by side to find which React component library fits your project in 2026.
Quick Verdict
Radix UI Primitives are the accessibility gold standard — unstyled, headless, and rock-solid. The catch is that you style everything yourself and manage each primitive package. Ninna UI is built on Radix internally, so you get that same accessibility but with styling, theming, and a unified API already done.
Feature Comparison
Side-by-side comparison of key features between Radix UI and Ninna UI.
| Feature | Ninna UI | Radix UI |
|---|---|---|
| Installation model | npm packages (12 scoped packages) | Per-component npm packages |
| Theming approach | CSS imports only - zero JS config | None - unstyled (BYO CSS) |
| Dark mode | Automatic via CSS - no provider needed | None - handled by your CSS |
| Component count | 67 components | 30+ primitives |
| Accessibility | Radix UI internally for complex widgets | Excellent WAI-ARIA compliance |
| Bundle size | Tree-shakeable, CSS-only theming | Small per-component bundles |
| Tailwind CSS | v4 native (CSS-first config) | Compatible (unstyled) |
| TypeScript | Strict mode, data-slot types | Excellent types |
| Customization | 98 data-slot CSS targets + cn() | Full control - unstyled primitives |
| Maintenance | Standard npm update | Standard npm update |
| SSR support | Full (React Router / Next.js) | Full support |
| React version | React 19+ | React 18+ |
| Color system | oklch perceptual colors | None (unstyled) |
| Learning curve | Low - CSS imports + React props | High - you must style everything |
| Update mechanism | npm update (semver) | npm update (semver) |
Why choose Ninna UI
Key advantages of Ninna UI over Radix UI for your next project.
Pre-styled components ready to use - Radix requires you to style everything from scratch
Complete design system with theming - Radix provides only unstyled primitives
One import for a fully themed component vs importing + styling each Radix primitive
67 production-ready components vs 30+ headless primitives
Ninna UI uses Radix internally - you get the same accessibility without the styling burden
Honest trade-offs
Where Radix UI has advantages - we believe in transparent comparisons.
Maximum customization - zero styling opinions
Well-established project with large community
No design system lock-in
Supports React 18 (Ninna UI requires React 19+)
Used as foundation by shadcn/ui and others
Migrating from Radix UI
Step-by-step guide to move your project from Radix UI to Ninna UI.
- 1
Replace Radix primitive imports with styled Ninna UI components
- 2
Remove custom CSS/Tailwind styling you built on top of Radix
- 3
Import a Ninna UI theme preset for instant styling: `@import "@ninna-ui/core/theme/presets/default.css"`
- 4
Ninna UI wraps Radix internally - you keep the same accessibility guarantees
- 5
Note: You gain a complete design system but lose full styling control
Ready to try Ninna UI?
Install in under 60 seconds. One CSS import, zero JavaScript config.
Looking for a Radix UI alternative?
See why developers switch from Radix UI to Ninna UI
Radix UI vs Ninna UI: FAQ
Does Ninna UI replace Radix UI?
It builds on it. Ninna UI uses Radix primitives internally for complex widgets, then adds Tailwind styling, oklch theming, and a consistent component API so you don't start from unstyled.
Do I still manage @radix-ui packages with Ninna UI?
No. Radix is an internal implementation detail wrapped by @ninna-ui/react-internal, so its packages and types never appear in your dependency tree or your code.
Is accessibility the same?
Yes — the underlying Radix behaviour (focus management, keyboard nav, ARIA) is preserved. You just don't have to wire up the styling.
More comparisons
Ninna UI for your framework
This comparison page is for informational purposes only. Information is based on official documentation and public data. All trademarks, logos, and brand names are the property of their respective owners. Last updated: March 2026.