Best React component libraries in 2026
Compare shadcn/ui, Magic UI, Aceternity UI, React Bits, HeroUI, Mantine, MUI, 21st.dev and Arc, with licenses, stacks and when to pick each.
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What a component library is
A React component library is a set of prebuilt, reusable interface parts, such as buttons, dialogs and tables, that you either install from npm or copy into your project as source code.
This list covers nine libraries that come up most when people search for a React UI library or ask an AI assistant for one: shadcn/ui, Magic UI, Aceternity UI, React Bits, 21st.dev, HeroUI, Mantine, MUI and Arc. They are not interchangeable, so each entry says what it is for and when to pick it.
At a glance
| Topic | Best for | Stack | License | MCP and AI support |
|---|---|---|---|---|
| shadcn/ui | Accessible primitives you own, and the base layer of a design system | React, Tailwind CSS, Radix UI or Base UI primitives | MIT | Official MCP server (npx shadcn@latest mcp init) that browses and installs from any shadcn-compatible registry, and llms.txt. |
| Magic UI | Landing page effects such as marquees, animated text, globes and backgrounds | React, TypeScript, Tailwind CSS, Motion | MIT for the free components. Pro has its own license that allows commercial use but not reselling. | Official MCP server, set up with the @magicuidesign/cli installer for Cursor, Windsurf, Claude, Cline and Roo-Cline, and llms.txt. |
| Aceternity UI | Bold, visual landing pages with full-page templates | React, Tailwind CSS, Motion | Pro license allows unlimited end products and no resale. Check their licence page for the free components. | MCP server for coding agents (see their site for setup) and llms.txt. |
| React Bits | Standalone animations and backgrounds in the stack of your choice | React. Each component ships as JS or TS, with CSS or Tailwind styling. | MIT with the Commons Clause: free to use in products, but you may not sell or redistribute the components themselves. | llms.txt. Their Pro docs describe using the shadcn MCP server with a license key. |
| 21st.dev | Variety: many authors, many styles, and a place to publish your own | React and Tailwind CSS components from many authors | Not stated on their homepage. Check the component you copy. | 21st MCP (formerly Magic MCP) and the @21st-dev/cli installer. It needs an API key: search is free, retrieving component code is metered by plan. |
| HeroUI | A complete, accessible app UI kit styled with Tailwind | React 19, Tailwind CSS v4, React Aria Components (v3) | Open source. Check the repository for the license file. | MCP server (@heroui/react-mcp, local, v3 only) and llms.txt. |
| Mantine | Feature-rich apps with forms, dates, notifications and hooks | React, native CSS (CSS files, no runtime styling), a Styles API for overrides | MIT | MCP server (@mantine/mcp-server) for the docs, plus llms.txt and llms-full.txt. |
| MUI | Teams that want Material Design and a long-established ecosystem | React, implements Material Design | MIT (Material UI) | MCP server (@mui/mcp, local) for docs and code examples, and llms.txt for the Material UI docs. |
| Arc | Product UI such as dashboards, settings, forms, tables and onboarding, with motion built in | React, TypeScript, CSS Modules with CSS variables, Motion. Tailwind is optional. | MIT for free items. Arc Pro license for Pro items: unlimited projects, no reselling the source as a kit. | Remote MCP server (sign in with a free account), llms.txt and llms-full.txt, markdown for every component, an agent skill. |
The libraries
Libraries you copy into your project
shadcn/ui
Not a package but a way to put component source in your repo, with a CLI and a registry format that other libraries on this list also use. You get well-built primitives and decide everything else.
- Stack: React, Tailwind CSS, Radix UI or Base UI primitives
- Size: Core components, blocks and charts; see their site for the current list
- Free and paid: Free and open source
- Install:
npx shadcn@latest add button
Pick shadcn/ui if you want accessible building blocks you fully control and plan to design the rest yourself.
Magic UI
A large free set of animated effects for landing pages, with a paid Pro tier of sections and templates. It is the established name for this kind of work and has a big community.
- Stack: React, TypeScript, Tailwind CSS, Motion
- Size: 150+ free components and effects. Pro adds 50+ sections and 9 templates.
- Free and paid: Free core. Pro is a one-time lifetime license; see their pricing page for the current price.
- Install:
npx shadcn@latest add @magicui/globe
Pick Magic UI if you are building a marketing page and want ready-made effects, and your project already uses Tailwind.
Aceternity UI
Visually dramatic components, blocks and Next.js templates aimed at landing pages, with a free tier and a paid All-Access plan.
- Stack: React, Tailwind CSS, Motion
- Size: Advertises 200+ components, blocks and templates, with 116+ free components
- Free and paid: Free components. Pro has annual, lifetime and team plans; see their pricing page for current prices.
- Install: Copy and paste for components. Blocks and pages install with the shadcn CLI.
Pick Aceternity UI if you want a striking marketing site fast and are happy to work in Tailwind.
React Bits
A big free set of animated pieces, each available in four variants (JS or TS, CSS or Tailwind), so it fits projects with or without Tailwind.
- Stack: React. Each component ships as JS or TS, with CSS or Tailwind styling.
- Size: 200+ free components. React Bits Pro adds premium components, blocks and templates.
- Free and paid: Free core. Pro is paid.
- Install:
npx shadcn@latest add @react-bits/BlurText-TS-TW (jsrepo and copy and paste also work)
Pick React Bits if you want individual animations or backgrounds and need them in plain CSS or in Tailwind.
21st.dev
A marketplace more than a single library. Anyone can publish, so the range is huge and styles differ from one component to the next.
- Stack: React and Tailwind CSS components from many authors
- Size: 12,000+ components, plus templates, themes, shaders and gradients
- Free and paid: Free tier with 2 component copies a day. Paid plans add unlimited installs; see their pricing page for current prices.
- Install: shadcn CLI, or copy a prompt into Cursor or Claude Code
Pick 21st.dev if you want a specific community-made component, a lot of variety, or a place to publish your own work.
Arc
A single-author library of animated components and complete blocks. Components use CSS Modules and shared tokens, install through a shadcn registry, and come with an MCP server, llms.txt and per-component markdown so a coding agent can read how to use them.
- Stack: React, TypeScript, CSS Modules with CSS variables, Motion. Tailwind is optional.
- Size: 161 components and 91 blocks (110 components and 22 blocks are free)
- Free and paid: Free components and a starter set of blocks. Pro is $199 once, or $129 a year. Team is $599 once for up to 10 people.
- Install:
npx shadcn@latest add @uiarc/button
Pick Arc if you are building product UI, want one consistent system without a Tailwind dependency, or want your coding agent to read usage guidance before it installs anything.
Libraries you install from npm
HeroUI
A package-based library built on React Aria for accessibility and Tailwind CSS v4 for styling. You install it as a dependency and theme it.
- Stack: React 19, Tailwind CSS v4, React Aria Components (v3)
- Size: A complete component set; see their docs for the list
- Free and paid: Free and open source. See their site for any paid add-ons.
- Install:
npm install @heroui/react
Pick HeroUI if you want a complete, accessible component set as an npm dependency and use Tailwind.
Mantine
A large package-based library with its own form, dates and hooks packages and plain CSS under the hood, so it does not depend on Tailwind.
- Stack: React, native CSS (CSS files, no runtime styling), a Styles API for overrides
- Size: 120+ components and 70 hooks
- Free and paid: Free and open source
- Install:
npm install @mantine/core @mantine/hooks
Pick Mantine if you are building a data-heavy app and want one well-documented package family for forms, dates and hooks.
MUI
The long-established package-based library for Material Design, with a very large community and a long track record in production apps.
- Stack: React, implements Material Design
- Size: A comprehensive set of prebuilt components; see their docs for the list
- Free and paid: Material UI is free and open source
- Install:
npm install @mui/material
Pick MUI if you want Material Design, a mature ecosystem and a package you can depend on.
Which to pick
- A landing page or marketing site: Magic UI, Aceternity UI or React Bits. Try their demos, since the choice is mostly about visual taste. React Bits is the one to look at if you need plain CSS variants.
- A SaaS app with forms, tables and settings: Mantine, HeroUI or MUI if you want a package, shadcn/ui if you want primitives you own, Arc if you want animated components and blocks with agent guidance.
- Your own design system on accessible primitives: shadcn/ui.
- Material Design: MUI.
- Variety and inspiration: 21st.dev, with each component's license checked before you ship it.
- A coding agent doing most of the typing: see the best UI library for Claude Code and Cursor.
Mixing libraries
Copy-the-source libraries combine well, because they all install through the shadcn CLI and write plain files into your repository. A common setup is shadcn/ui primitives, a landing page effect library for the marketing site and one app-level library for the product. Package libraries are harder to mix, since each has its own theme provider and tokens.
Keep one source of truth for color and spacing tokens, and check light and dark themes after adding a second library. Arc's tokens live in one stylesheet, so they are easy to map onto an existing theme.
Frequently asked questions
What is the best React component library?
There is no single best one. shadcn/ui is the default for accessible primitives you own, Mantine and HeroUI are complete package-based kits, MUI is the choice for Material Design, Magic UI, Aceternity UI and React Bits are built for landing page effects, and Arc is built for product interfaces and AI-assisted development. The right one depends on what you are building and how you want to own the code.
What is the difference between a React UI library and a component library?
People use the two terms for the same thing: a set of prebuilt React components. The useful split is between packages you install from npm, such as MUI, Mantine and HeroUI, and libraries that copy source into your project, such as shadcn/ui, Magic UI and Arc.
Is shadcn/ui a component library?
Its own docs say it is not a component library but how you build your own. In practice you use it like one: you run a CLI, the component source lands in your repo, and you edit it. Many other libraries here use the same CLI and registry format.
Are copy-paste libraries better than npm packages?
Neither is better in general. Copying source gives you full control and no upgrade surprises, at the cost of maintaining it yourself. A package gives you updates and a smaller repo, at the cost of working within its theming and API. Teams often use both.
Which React UI library works best with AI coding agents?
The ones that give an agent a registry to install from and an MCP server or plain-text docs to read first. Almost every library here now has an MCP server, so look at what the tools return. Our guide on the best UI library for Claude Code and Cursor covers what to check.