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Frontend Build Tools & CSS

UnoCSS alternatives

Ranked by how many scanned sites use each. Once we see sites drop UnoCSS, where they go next ranks first.

UnoCSS11 sites, 0 in the last 90 days, open-source

On-demand atomic CSS engine whose utilities all come from presets rather than a built-in core.

20 alternatives to UnoCSS

Growth is sites that added it minus confirmed removals in the last 90 days.

1

Tailwind CSS5,303 sites, +7 in 90 days, open-source

Utility-first CSS framework: a page is styled with classes composed directly in its markup.

2

core-js3,526 sites, +5 in 90 days, open-source

Modular JavaScript polyfill library for ECMAScript features and proposals, whose maintainer said in 2023 he worked alone.

3

Turbopack2,127 sites, +4 in 90 days, open-source

Incremental Rust bundler built into Next.js, where it is the default.

4

Bootstrap1,364 sites, +1 in 90 days, open-source

Open source CSS framework that calls itself a design system for everyone, with code under MIT and docs under CC BY 3.0.

5

Radix UI1,210 sites, 0 in 90 days, open-source

Accessible, unstyled React UI component library from WorkOS, with a styled companion called Radix Themes.

6

shadcn/ui773 sites, 0 in 90 days, open-source

Copy-and-own React component collection: the source lands in your project, not in a dependency.

7

Rollup700 sites, 0 in 90 days, open-source

JavaScript module bundler built on standard ES modules, for libraries and apps.

8

Vite700 sites, 0 in 90 days, open-source

Frontend build tool made by Vue.js creator Evan You, with production builds that run on the Rust-based Rolldown.

9

CSS Modules455 sites, 0 in 90 days, open-source

CSS file convention that scopes class names locally by default, to avoid clashes between components' styles.

10

Stitches380 sites, 0 in 90 days, open-source

Variant-focused CSS-in-JS library that has gone unmaintained since 2023.

11

styled-components322 sites, 0 in 90 days, open-source

Template-literal CSS-in-JS library for React, in maintenance mode since 2025 but still shipping releases.

12

Emotion296 sites, 0 in 90 days, open-source

CSS-in-JS library with a framework-agnostic package and a React one that renders on the server without setup.

13

webpack265 sites, 0 in 90 days, open-source

MIT-licensed static module bundler for modern JavaScript applications.

14A

AOS (Animate On Scroll)236 sites, 0 in 90 days, open-source

Scroll animation library driven by data-aos attributes in the HTML.

15

Animate.css219 sites, 0 in 90 days, open-source

Cross-browser CSS animation library that its homepage sells as just-add-water.

16

normalize.css126 sites, 0 in 90 days, open-source

Alternative to a CSS reset that aims to make browsers render elements more consistently.

17

Headless UI121 sites, 0 in 90 days, open-source

Unstyled UI component library from Tailwind Labs, published as React and Vue packages.

18

Modernizr102 sites, 0 in 90 days, open-source

Browser feature-detection library for serving newer features only to browsers that support them.

19

MUI (Material UI)85 sites, 0 in 90 days, freemium

Google's Material Design implemented as a React component library, from the company Material UI SAS.

20

SystemJS74 sites, 0 in 90 days, open-source

Hookable, standards-based JavaScript module loader that keeps working in older browsers back to IE11.