Plex UI
Figma Kit

Plex UI vs Radix UI

A fair, side-by-side comparison for teams evaluating a styled design system against unstyled accessible primitives. Plex UI uses Radix internally — this page explains when each layer is the right choice.

Key differences

  • Radix UI provides unstyled, accessible primitives — you bring all styling and design decisions.
  • Plex UI builds on Radix primitives and adds production-ready styles, design tokens, and Figma parity.
  • Radix is the right pick when you need full control over every visual detail from scratch.
  • Plex UI is the right pick when you want a styled system that works out of the box with consistent sizing.

Plex UI vs Radix UI feature comparison table

Button/control sizes

Plex UI

9 sizes (22px to 48px)

Radix UI

Unstyled — size is user-defined

Total components

Plex UI

35 components + 14 hooks

Radix UI

28 primitives

Figma design system

Plex UI

Official paid kit

Radix UI

Design tokens

Plex UI

3-layer token architecture

Radix UI

No token system (unstyled)

Figma-to-code parity

Plex UI

Exact parity by design

Radix UI

No Figma workflow

AI editor compatibility

Plex UI

Designed for AI-assisted workflows

Radix UI

Works as primitives layer

Icon library

Plex UI

6,600+ icons bundled

Radix UI

Radix Icons (318 icons, separate package)

Dark mode approach

Plex UI

Token-driven via semantic variables

Radix UI

Unstyled — theme is user responsibility

Accessibility

Plex UI

WAI-ARIA compliant

Radix UI

WAI-ARIA compliant

TypeScript support

Plex UI

Radix UI

Styling approach

Plex UI

Tailwind CSS 4 + CSS variables

Radix UI

Unstyled — bring your own CSS

Pricing

Plex UI

React free; Figma from $49

Radix UI

Fully free and open-source

Community size

Plex UI

Growing commercial + OSS audience

Radix UI

Large, established OSS community

Where Radix UI wins

  • Fully unstyled primitives give maximum control over every visual detail.
  • Battle-tested accessibility patterns trusted across the React ecosystem.
  • Zero styling opinions — works with any CSS approach or design system.
  • Large ecosystem of styled wrappers and community integrations built on top.

Where Plex UI wins

  • Production-ready styles out of the box — no need to build a design system on top of primitives.
  • Official Figma design system with exact Figma-to-code parity.
  • 9-step control sizing for precise density control across dashboards and marketing layouts.
  • Three-layer design token architecture for scalable theming and component-level overrides.
  • Built with explicit AI editor compatibility in mind for fast code generation workflows.

Pricing comparison: Plex UI vs Radix UI

Radix UI is fully free and open-source. Plex UI's React library is also free. The difference is in the design layer: Plex UI offers a first-party Figma system from $49, while Radix has no official Figma product.

Who should use which?

Choose Radix UI if you need

  • Full control over styling with no visual opinions imposed.
  • A foundation for building a fully custom design system from scratch.
  • Accessible primitives that integrate into any existing CSS workflow.

Choose Plex UI if you need

  • Design and code systems that stay aligned over time.
  • Consistent sizing with 9-step controls across key components.
  • A production-ready token architecture for long-term scaling.

Explore Plex UI

Review the component docs, then compare plan details if you also want the full Figma design system.

View docsSee pricing