Latest news
December 17, 2025
Industry Leaders on the KotlinConf’25 Stage: What Global Brands Built With Kotlin
The Kotlin ecosystem continues to grow among the world’s most recognized brands, including Meta, AWS, Duolingo, Uber, and others. At KotlinConf 2025, these companies took the stage to share practical, real-world engineering stories. KotlinConf is where developers can learn directly from the teams building products at global scale. Software engineers showcase how they are tackling […]
December 16, 2025
Kotlin 2.3.0 Released
The Kotlin 2.3.0 release is out! This version includes new language features, stable ones, and other features now enabled by default. This release also brings tooling updates, performance improvements for different platforms, and important fixes. Here are some additional highlights from this release: For the complete list of changes, refer to What’s new in Kotlin […]
December 12, 2025
Building AI Agents in Kotlin – Part 3: Under Observation
Previously in this series: Two articles in, and our coding agent can already do quite a bit. It can explore projects, read and write code, execute shell commands, and run tests. Adding a definition of done (DoD) in our last article gave it the feedback loop it needed – the agent now iterates until all […]
December 11, 2025
A Better Way to Explore kotlinx-benchmark Results with Kotlin Notebooks
Benchmarking is an important part of writing efficient Kotlin code. The kotlinx-benchmark library helps you measure and compare performance across different implementations or hardware configurations. However, raw text results only take you so far. Sometimes you need to visualize your data, not just read it. That’s where Kotlin notebooks come in. Kotlin notebooks combine the […]
fun main() {
val name = "stranger" // Declare your first variable
println("Hi, $name!") // ...and use it!
print("Current count:")
for (i in 0..10) { // Loop over a range from 0 to 10
print(" $i")
}
}Kotlin in action
Share code on your terms and for different platforms
Kotlin + AI
JetBrains is investing in AI models tailored for Kotlin, providing open data, benchmarks, and AI-native tooling integrated into your workflow.
At the same time, Kotlin makes it easy to build your own AI-powered features with seamless backend integrations and a growing ecosystem.
What you get with Kotlin + AI
- Strong support across JetBrains AI tools like AI Assistant and Junie
- Robust functionality for building AI-powered apps on the JVM
- Native integration with tools like Spring AI and LangChain4j
- Open data and benchmarks for better code generation
Build your own AI agents with Koog
Koog is JetBrains’ new Kotlin-native framework for creating powerful AI agents that run locally, interact with tools, and automate complex tasks. Whether you’re developing a simple chat assistant or an advanced multi-step workflow, Koog gives you full control with clean Kotlin code – no external services are required. Build, extend, and experiment with AI agents entirely in Kotlin.
Get startedBig, friendly and helpful community
Kotlin Foundation
