⚡ User Interface Frameworks

User Interface (UI) frameworks are libraries of code, design elements, and components that help web developers create user interfaces with consistent structure and behavior.

They provide responsive grid systems, pre-built visual and interactive components, layout utilities, styling conventions, and integration tools that streamline development, ensure cross-device compatibility, and reduce the need to write UI code from scratch.

According to our research, user interface frameworks are used on 42.5% of all websites.
81.3% of these sites use only one UI framework, 17.8% use two, and 1% use three or more at the same time.

⭐ Most Popular in 2026

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

The most popular is Bootstrap with a substantial share of 63.5%, followed by jQuery UI with 37.1% and Tailwind CSS with 6.7%.

🚀 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.

✨ Best UI Frameworks

Below is a more detailed list of the top 25 of the 63 UI 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
jQuery UI
San Francisco, California, United States

A curated set of user interface interactions, effects, widgets, and themes built on top of the jQuery JavaScript Library.

FreeOpen source
3
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+
4
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
5
AMP
San Francisco, California, United States

An open source HTML framework for creating lightweight pages that are optimized for mobile web browsing and load faster.

FreeOpen source
6
UIKit
Hamburg, Germany

A lightweight and modular front-end framework.

FreeOpen source
7
Bulma
London, United Kingdom

An open source modular CSS framework based on Flexbox.

FreeOpen source
8
Materialize
Pittsburgh, Pennsylvania, United States

A responsive CSS framework based on Google's Material Design guidelines.

FreeOpen source
9
Radix UI
San Francisco, California, United States

An open-source component library optimized for fast development, easy maintenance, and accessibility.

FreeOpen source
10
Material UI
Paris, France

An open-source React component library that implements Google's Material Design.

FreeOpen source$180+/developer/year
11
Spectre.css
Shanghai, China

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

FreeOpen source
12
Headless UI
Kitchener, Ontario, Canada

Completely unstyled, fully accessible UI components, designed to integrate beautifully with Tailwind CSS.

FreeOpen source
13
Angular Material
Mountain View, California, United States

A library of UI components for Angular that implements Google's Material Design specification.

FreeOpen source
14
W3.CSS
Sandnes, Norway

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

FreeOpen source
15
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
16
Pure CSS
New York, United States

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

FreeOpen source
17
MDB
Warsaw, Poland

A UI toolkit that combines Bootstrap with Google's Material Design guidelines.

FreeOpen source€29+
18
Layui
Hangzhou, China

A Chinese modular front-end UI library designed to build web interfaces with a simple API and minimal dependencies.

FreeOpen source
19
Kendo UI
Burlington, Massachusetts, United States

A commercial bundle of four JavaScript UI libraries built natively for jQuery, Angular, React, and Vue.

FreeOpen source$799+/year
20
Semantic UI
New York, United States

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

FreeOpen source
21
Chakra UI
Manchester, United Kingdom

A comprehensive library of accessible, reusable, and composable React components.

FreeOpen source
22
Material Design Lite
Mountain View, California, United States

A legacy user interface framework that implements Material Design components using plain CSS, JavaScript, and HTML without external dependencies.

FreeOpen sourceLegacy
23
Ant Design
Hangzhou, China

An enterprise-level UI design language and React component library.

FreeOpen source
24
Vuetify
Southlake, Texas, United States

An open-source, no design-skills-required UI library of beautifully handcrafted Vue components.

FreeOpen source
25
Vant
Hangzhou, China

A lightweight, customizable Vue UI library for mobile web apps.

FreeOpen source

👉 See Also

Data is based on the analysis of 3,199,011 websites.
Statistics were last calculated on .
For details, see our methodology and disclaimer.