10 Best Free Open-Source React UI Kits in 2026
Free and open-source — these 10 React UI kits give you production-ready components without the price tag. MIT licensed, community-driven.
You don't need to pay for quality React components. The open-source ecosystem is rich with MIT-licensed UI kits that are production-ready, well-maintained, and free. Here are 10 of the best.
All libraries on this list are MIT licensed (or similar permissive license) and free for commercial use.
Ninna UI
67 components, 54 blocks, 12 tree-shakeable packages. CSS-first theming with oklch, Radix internals, 708 axe tests in CI. MIT licensed. Best for teams who want npm updates with Tailwind v4 alignment.
Explore Ninna UIshadcn/ui
Copy-paste components built on Radix UI and Tailwind. Around 65K stars. MIT licensed (you own the source). Best for teams who want full source ownership.
MUI
100+ components with Material Design. Around 93K stars. MIT licensed. Best for Material Design projects.
Mantine
100+ components plus hooks library. Around 28K stars. MIT licensed. Best for rich features beyond components.
Chakra UI
Style-props API with Emotion. Around 38K stars. MIT licensed. Best for style props enthusiasts.
DaisyUI
Tailwind plugin with CSS component classes. Zero JS. Around 35K stars. MIT licensed. Best for zero-JS projects.
Radix UI
Headless primitives with accessibility. Around 35K stars. MIT licensed. Best for bespoke design systems.
Headless UI
Headless primitives from the Tailwind team. Around 25K stars. MIT licensed. Best for minimal Tailwind projects.
HeroUI (formerly NextUI)
Tailwind-based with beautiful defaults. Around 22K stars. MIT licensed. Best for visual polish.
Park UI
Built on Ark UI with multiple styling options. MIT licensed. Best for styling flexibility.
Wrapping up
Every library on this list is free and open-source. The 'best' one is the one that fits your stack: Tailwind v4 + npm (Ninna UI), copy-paste (shadcn/ui), Material Design (MUI), rich features (Mantine), style props (Chakra UI), or zero JS (DaisyUI).