Code

UI libraries

6 technologies: what each one does, whether it is SaaS or open source, its price range and its website.
  • React

    1.3M sitesOpen source

    React is an open-source JavaScript library for building user interfaces or UI components.

    Used byAirbnb,Cal.com,Discord,Figma+14

  • Vue.js

    619.1K sitesOpen source

    Vue.js is an open-source model–view–viewmodel JavaScript framework for building user interfaces and single-page applications.

    Used byGitLab

  • Preact

    385.8K sitesOpen source

    Preact is a JavaScript library that describes itself as a fast 3kB alternative to React with the same ES6 API.

  • Angular

    118.5K sitesOpen source

    Angular is a TypeScript-based open-source web application framework led by the Angular Team at Google.

  • Svelte

    94.7K sitesOpen source

    Svelte is a free and open-source front end compiler created by Rich Harris and maintained by the Svelte core team members.

  • SolidJS

    92 sitesOpen source

    SolidJS is a purely reactive library. It was designed from the ground up with a reactive core. It's influenced by reactive principles developed by previous libraries.

Data from the open Wappalyzer database (enthec/webappanalyzer, GPL-3.0), updated every week. Site counts from the HTTP Archive (September 2026). Code tools (frameworks, build, ORMs…) come from a list kept by Faundr.