Gleam Language

Gleam is a friendly language for building type-safe systems that scale.

The power of a type system, the expressiveness of functional programming, and the reliability of the highly concurrent, fault tolerant Erlang runtime, with a familiar and modern syntax.

Reliable and scalable

Running on the battle-tested Erlang virtual machine that powers planet-scale systems such as WhatsApp and Ericsson, Gleam is ready for workloads of any size.

Thanks to a multi-core actor based concurrency system that can run millions of concurrent tasks, fast immutable data structures, and a concurrent garbage collector that never stops the world, your service can scale and stay lightning fast with ease.

Ready when you are

Gleam comes with compiler, build tool, formatter, editor integrations, and package manager all built in, so creating a Gleam project is just running gleam new.

As part of the wider BEAM ecosystem, Gleam programs can use thousands of published packages, whether they are written in Gleam, Erlang, or Elixir.

Here to help

No null values, no exceptions, clear error messages, and a practical type system. Whether you're writing new code or maintaining old code, Gleam is designed to make your job as fun and stress-free as possible.

Multilingual

Gleam makes it easy to use code written in other BEAM languages such as Erlang and Elixir, so there's a rich ecosystem of thousands of open source libraries for Gleam users to make use of.

Gleam can additionally compile to JavaScript, enabling you to use your code in the browser, or anywhere else JavaScript can run. It also generates TypeScript definitions, so you can interact with your Gleam code confidently, even from the outside.