Kotlin
Concise. Multiplatform. Fun.
Kotlin is a programming language developed by JetBrains for building applications across backend, mobile, web, and desktop targets. It addresses the need to write and maintain code for multiple platforms from a single codebase, while offering null safety, structured concurrency, and interoperability with Java.
The language supports object-oriented and functional styles, asynchronous programming, and testing. Kotlin Multiplatform allows shared logic across operating systems including iOS, Android, macOS, Windows, and Linux. The ecosystem includes the standard library, coroutines, serialization, date and time, collections, and JVM metadata, along with Gradle plugins, Ktor, and Compose Multiplatform. Tooling covers the IntelliJ IDEA and Android Studio IDEs, a Playground, Koans, and a language tour. AI-related resources include open benchmarks and agent-ready tooling.
Kotlin is aimed at developers building backend, Android, and cross-platform applications, as well as teams migrating from Java. It is distributed under the Apache 2 license and is supported by the Kotlin Foundation.
12 alternatives to Kotlin
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