Headless UI vs Ninna UI
Unstyled accessible components from the Tailwind team. Compare Headless UI and Ninna UI side by side to find which React component library fits your project in 2026.
Quick Verdict
Headless UI is the gold standard for unstyled, accessible interactive components from the Tailwind team itself. It's intentionally minimal — 15+ primitives like Dialog, Menu, Tab, and Listbox, all with excellent keyboard and ARIA support, no styling opinions. Ninna UI is the complement: 67 styled, themed components that use Radix internally for the same accessibility, but with the visual layer already done.
Feature Comparison
Side-by-side comparison of key features between Headless UI and Ninna UI.
| Feature | Ninna UI | Headless UI |
|---|---|---|
| Installation model | npm packages (12 scoped packages) | npm package |
| Theming approach | CSS imports only - zero JS config | Bring your own (Tailwind classes) |
| Dark mode | Automatic via CSS - no provider needed | Tailwind dark mode (manual) |
| Component count | 67 components | 15+ interactive components |
| Accessibility | Radix UI internally for complex widgets | Built-in ARIA + keyboard navigation |
| Bundle size | Tree-shakeable, CSS-only theming | Small (headless, no styles) |
| Tailwind CSS | v4 native (CSS-first config) | v3 + v4 support (designed for Tailwind) |
| TypeScript | Strict mode, data-slot types | Full TypeScript support |
| Customization | 98 data-slot CSS targets + cn() | Full styling control (unstyled) |
| Maintenance | Standard npm update | Standard npm update |
| SSR support | Full (React Router / Next.js) | Full |
| React version | React 19+ | React 18+ |
| Color system | oklch perceptual colors | N/A (unstyled) |
| Learning curve | Low - CSS imports + React props | Medium - you build the styling layer |
| Update mechanism | npm update (semver) | npm update (semver) |
Why choose Ninna UI
Key advantages of Ninna UI over Headless UI for your next project.
67 styled, themed components - Headless UI ships 15+ unstyled primitives you must style yourself
CSS-only theming with oklch presets - Headless UI has no theming system, you build it
Radix-powered accessibility for a wider range of components - Headless UI covers fewer interactive patterns
Ready-to-use components with consistent design - Headless UI requires building every visual layer
Lower time-to-ship - no need to design and implement styling for each component
Honest trade-offs
Where Headless UI has advantages - we believe in transparent comparisons.
From the Tailwind team - designed specifically for Tailwind CSS with perfect integration
Completely unstyled - you have 100% design freedom with no opinions baked in
Very small bundle size - only the behaviour, no CSS at all
Excellent accessibility - keyboard navigation, ARIA, and focus management built in
Simple, predictable API with no configuration or theme system to learn
Migrating from Headless UI
Step-by-step guide to move your project from Headless UI to Ninna UI.
- 1
Replace Headless UI primitives with Ninna UI styled equivalents
- 2
Move your custom Tailwind styling into data-slot CSS targets or className overrides
- 3
Replace manual dark mode classes with a Ninna UI theme preset (includes dark mode)
- 4
Map Headless UI components: Dialog → Modal, Menu → DropdownMenu, Tab → Tabs, Listbox → Select
- 5
Note: You gain pre-styled components and theming but lose full styling control
Building a dialog
Headless UI
import { Dialog } from "@headlessui/react";
<Dialog open={isOpen} onClose={setIsOpen}>
<Dialog.Panel className="rounded-lg bg-white p-6
shadow-xl border border-gray-200 max-w-md">
<Dialog.Title className="text-lg font-semibold">
Title
</Dialog.Title>
{/* You style everything yourself */}
</Dialog.Panel>
</Dialog>Ninna UI
import { Modal } from "@ninna-ui/overlays";
<Modal open={isOpen} onClose={setIsOpen} title="Title">
{/* Styled, themed, accessible — out of the box */}
<Text>Content goes here.</Text>
</Modal>Headless UI gives you behaviour; Ninna UI gives you behaviour + styling + theming.
Ready to try Ninna UI?
Install in under 60 seconds. One CSS import, zero JavaScript config.
Looking for a Headless UI alternative?
See why developers switch from Headless UI to Ninna UI
Headless UI vs Ninna UI: FAQ
Does Ninna UI use Headless UI internally?
No — Ninna UI uses Radix UI primitives internally for complex widgets. Headless UI is a separate project from the Tailwind team. Both provide excellent accessibility, but Radix covers a wider range of component patterns.
How many components does Headless UI have?
Around 15 interactive primitives (Dialog, Menu, Tab, Listbox, Combobox, Switch, Disclosure, Popover, RadioGroup, Checkbox, Transition). Ninna UI ships 67 components including forms, data display, layout, and feedback components that Headless UI doesn't cover.
Which is better for a new project?
If you want to ship fast with styled components, Ninna UI. If you want full design control and are building a custom design system, Headless UI gives you the behaviour primitives to style yourself.
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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.