Languages

PHP

4.2M sitesOpen source

PHP is a general-purpose scripting language used for web development.

Java

261.8K sitesOpen source

Java is a class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible.

Used byAirbnb,Conta Azul,Hotmart,iFood+2

TypeScript

192.4K sitesOpen source

TypeScript is an open-source language which builds on JavaScript by adding static type definitions.

Used byAirbnb,Cal.com,Documenso,Dub+11

Python

128K sitesOpen source

Python is an interpreted and general-purpose programming language.

Used byConta Azul,Discord,Duolingo,Olist+2

Ruby

109.9K sitesOpen source

Ruby is an open-source object-oriented programming language.

Used byCreditas,GitLab,RD Station,Shopify

Dart

5.8K sitesOpen source

Dart is an open-source, general-purpose, object-oriented programming language developed by Google.

C

3.3K sitesOpen source

C is a general-purpose, procedural computer programming language supporting structured programming, lexical variable scope, and recursion, with a static type system.

Scala

2.3K sitesOpen source

Scala is a general-purpose programming language providing support for both object-oriented programming and functional programming.

Used byDuolingo

Elixir

1.1K sitesOpen source

Elixir is a dynamic, functional language designed for building scalable and maintainable applications.

Used byDiscord,Plausible Analytics

Go

325 sitesOpen source

Go is an open source high-level programming language.

Used byConta Azul,Figma,GitLab,Notion+6

Rust

4 sitesOpen source

Rust is a multi-paradigm, general-purpose programming language designed for performance and safety, especially safe concurrency.

Used byDiscord,Figma,Notion,PostHog+2

Kotlin

1 sitesOpen source

Kotlin is a general purpose, free, open-source, statically typed “pragmatic” programming language initially designed for the JVM (Java Virtual Machine) and Android that combines object-oriented and functional programming features.

Used byAirbnb,Creditas,Duolingo,iFood+1

.NET

Open source

Microsoft's platform for C# apps on servers, desktop and mobile.

Used byRaycast,Stone

C#

Open source

Microsoft's language for .NET backends, desktop apps and Unity games.

C++

Open source

Fast compiled language for games, engines and native apps.

Used byFigma

Clojure

Open source

Functional Lisp on the JVM, known for immutable data and simple concurrency.

Used byNubank

CSS

Open source

The language that styles every web page.

Meta's typed language built on PHP and run by HHVM.

Used bySlack

HTML

Open source

The markup every web page is built with.

JavaScript

Open source

The language of the web: runs in every browser and, with Node.js or Bun, on the server.

Swift

Open source

Apple's language for iPhone, iPad and Mac apps.

Used byAirbnb,Duolingo,Raycast