Kotlin community has chosen the best libraries of 2024

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Kotlin community has chosen the best libraries of the year: 2024 voting results

The annual Kotlin Community Awards voting has concluded, and the developer community has determined the best libraries and tools in the Kotlin ecosystem for 2024. This year, participants cast over 15,000 votes, which is 23% more than last year. We have compiled the main winners in key categories.

Winners by category

Best library for web development: Ktor (3rd year in a row). The asynchronous framework from JetBrains continues to lead thanks to its modularity, KMP support, and excellent performance.
Best DI framework: Koin. Lightweight, reflection-free, with excellent Compose Multiplatform support — the choice of most mobile developers.
Best library for testing: MockK. A powerful mocking tool with a Kotlin-first API, coroutine support, and argument slots.
Best library for networking: Ktor Client (dedicated nomination). A universal HTTP client for JVM, JS, Native, and iOS.
Best tool for multiplatform development (KMP): Compose Multiplatform. A declarative UI framework that allows writing interfaces for Android, iOS, Desktop, and Web from a single codebase.
Best library for serialization: kotlinx.serialization. The de facto standard from JetBrains — safe, reflection-free, with support for JSON, ProtoBuf, CBOR.
Best library for asynchronous programming: Kotlin Coroutines. The foundation of modern Kotlin — lightweight coroutines and Flow.
Community special award: Detekt. A static code analyzer that helps maintain project cleanliness and style.

Why is this important for developers?

The Kotlin Community Awards voting is not just a ranking. It is a barometer of trends: in 2024, the community clearly bet on multiplatform (KMP) and tools that simplify DevOps. For example, the growing popularity of Detekt and Ktor Client indicates that developers are increasingly automating code quality and moving logic to client-server interaction.

How to use the winners in your projects?

If you are just starting to learn Kotlin or want to update your stack, here is a minimal set of winners:

Web backend: Ktor + kotlinx.serialization + Koin.
Mobile app (Android + iOS): Compose Multiplatform + Ktor Client + MockK.
Microservices: Ktor + Coroutines + Detekt for CI/CD.

All libraries are open source, actively maintained, and documented. You can start with the official quickstart guides on JetBrains Marketplace or GitHub.

What's next?

The Kotlin community is not stopping: plans have already been announced to integrate the K2 compiler into all major libraries, as well as to improve compatibility with WASM. Stay tuned for updates on