Gleam

Judgement

What it is

Developer tool

What it does

The compiler and tooling for Gleam, a statically typed functional language that runs on the Erlang VM or compiles to JavaScript.

Adopt it when

You want Erlang VM concurrency and fault tolerance with a friendly type system.

Watch out

A young ecosystem that is sponsor-funded rather than corporate-backed.

Ready for

Usable

Runs as

Command line

Built with

Rust and Erlang/OTP

How established

Established: started 10 years ago, latest release v1.19.2.

What the license allows

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

Judged on 2026-11-03 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: Gleam → Rust → runs on a microchip

How compilers were built, back to punched paper tape

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