⚡ 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.

Statistics based on 3.6M+ analyzed websites. About this data

⭐ 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 61.9% share.
It is followed by Tailwind CSS with 8.3% and Foundation with 2.5%.

✨ Best CSS Frameworks

Below is a more detailed list of 23 CSS frameworks we detect, ranked by their market share.

Available filters: Blazor CSS JS
RankNameMarket 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
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+
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
4
UIKit
Hamburg, Germany

A lightweight and modular front-end framework.

FreeOpen source
5
Bulma
London, United Kingdom

An open-source modular CSS framework based on Flexbox.

FreeOpen source
6
Spectre.css
Shanghai, China

A lightweight, responsive CSS framework designed for faster and extensible development.

FreeOpen source
7
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
8
W3.CSS
Sandnes, Norway

An open-source, pure CSS framework developed by the W3Schools team, designed for building responsive websites without JavaScript.

FreeOpen source
9
Pure CSS
New York, United States

A lightweight, responsive CSS framework developed by Yahoo for building fast and minimal web interfaces.

FreeOpen source
10
Semantic UI
New York, United States

An open-source component framework that helps developers create responsive layouts using human-friendly CSS class names.

FreeOpen source
11
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
12
YAML Framework
Berlin, Germany

A modular and lightweight CSS framework for flexible, accessible and responsive websites.

FreeOpen source
13
Primer CSS
San Francisco, California, United States

An open-source CSS framework systematically designed for and by GitHub.

FreeOpen source
14
Pico CSS

A minimalist and lightweight CSS framework for semantic HTML.

FreeOpen source
15
Milligram
Brazil

A minimalist CSS framework (only 2kb gzipped).

FreeOpen source
16
Basscss
New York, United States

A lightweight collection of immutable functional element styles.

FreeOpen source
⏳
Fomantic UI

An open-source component framework forked from Semantic UI to continue its active development.

FreeOpen source
18
Skeleton
Austin, Texas, United States

A simple, responsive CSS boilerplate that styles HTML elements and provides a responsive grid.

FreeOpen source
19
DaisyUI
Istanbul, Turkey

An open-source Tailwind CSS component library.

FreeOpen source
20
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
21
Picnic CSS

A lighweight CSS library with nice defaults and many plugins to kickstart your projects.

FreeOpen source
22
Emerald
Berlin, Germany

An opinionated responsive grid system written in LESS.

FreeOpen sourceLegacy
23
LuxaCSS
Londrina, Brazil

A clean and lightweight CSS kit that prioritizes minimalism, speed, and ease of maintenance.

FreeOpen source

👉 See Also

🗃️ About This Data