⚡ CSS Frameworks

CSS frameworks are user interface frameworks focused primarily on styling and layout through CSS (Cascading Style Sheets), with minimal or no reliance on JavaScript for core functionality.

They typically provide responsive grid systems, utility classes, predefined components, and theming support to ensure consistent design, fast styling, and cross-browser compatibility.

⭐ Most Popular in 2026

The following chart shows the leading CSS frameworks in 2026, based on market share.

The most popular is Bootstrap, which dominates the market with an overwhelming 63.3% share.
It is followed by Tailwind CSS with 6.8% and Foundation with 2.8%.

Bootstrap 63.3%
Tailwind CSS 6.8%
Foundation 2.8%
UIKit 2%
Bulma 1%
Spectre.css 0.3%
W3.CSS 0.2%
Tachyons 0.2%
Pure CSS 0.2%
Semantic UI 0.1%
YAML Framework 0.04%
Shoelace 0.04%
Primer CSS 0.02%
Basscss 0.007%
Pico CSS 0.007%

🚀 Country Highlights

Here is a list of frameworks that are especially popular in certain countries.
Differences between global and country rankings are shown in parentheses.

Foundation is #3 in the Philippines ^(-1)
UIKit is #3 in Greece ^(-3)
Bulma is #4 in Japan ^(-3)
Tachyons is #7 in Brazil ^(-8)
W3.CSS is #8 in India ^(-6)
YAML Framework is #9 in Germany ^(-19)

✨ Best CSS Frameworks

Below is a more detailed list of 22 CSS frameworks we detect, ranked by their market share.

Available filters: Blazor CSS JS

Rank	Name	Market share
1	Bootstrap San Francisco, California, United States An open-source framework for building responsive, mobile-first websites and web applications with HTML, CSS, and JavaScript, originally developed at Twitter. FreeOpen source	63.3%
2	Tailwind CSS Kitchener, Ontario, Canada An open-source utility-first framework that provides low-level CSS classes for building user interfaces directly in markup. FreeOpen source$149+	6.8%
3	Foundation Campbell, California, United States An open-source responsive framework that provides a customizable grid system, a library of UI components, HTML templates, and JavaScript plugins. FreeOpen source	2.8%
4	UIKit Hamburg, Germany A lightweight and modular front-end framework. FreeOpen source	2%
5	Bulma London, United Kingdom An open-source modular CSS framework based on Flexbox. FreeOpen source	1%
6	Spectre.css Shanghai, China A lightweight, responsive CSS framework designed for faster and extensible development. FreeOpen source	0.3%
7	W3.CSS Sandnes, Norway An open-source, pure CSS framework developed by the W3Schools team, designed for building responsive websites without JavaScript. FreeOpen source	0.2%
8	Tachyons Boise, Idaho, United States A lightweight, functional CSS framework that enables the creation of fast, responsive, and accessible web interfaces without writing custom CSS. FreeOpen source	0.2%
9	Pure CSS New York, United States A lightweight, responsive CSS framework developed by Yahoo for building fast and minimal web interfaces. FreeOpen source	0.2%
10	Semantic UI New York, United States An open-source component framework that helps create responsive layouts using human-friendly CSS class names. FreeOpen source	0.1%
11	YAML Framework Berlin, Germany A modular and lightweight CSS framework for flexible, accessible and responsive websites. FreeOpen source	0.04%
12	Shoelace A framework-agnostic library of production-ready web user interface components built entirely with native Web Component standards, ensuring consistent design and behavior across any JavaScript framework or none at all. FreeOpen source	0.04%
13	Primer CSS San Francisco, California, United States An open-source CSS framework systematically designed for and by GitHub. FreeOpen source	0.02%
14	Basscss New York, United States A lightweight collection of immutable functional element styles. FreeOpen source	0.007%
15	Pico CSS A minimalist and lightweight CSS framework for semantic HTML. FreeOpen source	0.007%
16	Milligram Brazil A minimalist CSS framework (only 2kb gzipped). FreeOpen source	0.006%
17	Skeleton Austin, Texas, United States A simple, responsive CSS boilerplate that styles HTML elements and provides a responsive grid. FreeOpen source	0.006%
18	Water.css San Francisco, California, United States A classless CSS framework that allows you to make simple websites just a little bit nicer. FreeOpen source	0.005%
19	DaisyUI Istanbul, Turkey An open-source Tailwind CSS component library. FreeOpen source	0.004%
20	Picnic CSS A lighweight CSS library with nice defaults and many plugins to kickstart your projects. FreeOpen source	0.002%
21	Emerald Berlin, Germany An opinionated responsive grid system written in LESS. FreeOpen sourceLegacy	<0.001%
22	LuxaCSS Londrina, Brazil A clean and lightweight CSS kit that prioritizes minimalism, speed, and ease of maintenance. FreeOpen source	<0.001%

👉 See Also

✨ Related technologies
- CSS
⚡CSS tools
⚡JavaScript CSS libraries

Data is based on the analysis of 3,325,341 websites.
Statistics were last calculated on March 31, 2026.
For details, see our methodology and disclaimer.