Kotlin DataFrame

Judgement

What it is

Building block

What it does

A JetBrains library for type-safe, in-memory processing of tabular and hierarchical data in Kotlin, with generated column accessors.

Adopt it when

You analyse data in Kotlin, for example in Kotlin notebooks, and want compile-time checks on column access.

Watch out

Version 1.0 is still a release candidate, and the Kotlin data science ecosystem is small next to Python's.

Ready for

Usable

Runs as

Library

Built with

Kotlin and JVM

How established

Established: started 6 years ago, latest release v1.0.0-rc02.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-06 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: Kotlin DataFrame → Kotlin → JDK → LLVM project → runs on a microchip

How compilers were built, back to punched paper tape

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