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Gleam vs Haskell: catalog facts
Gleam	Haskell
Free Free and open source, supported by sponsors.	Free Free and open source.
Windows, macOS, Linux, Command line	Windows, Command line
Static types on the Erlang VM Compiler, build tool, formatter and package manager in one	Strong static type system catches errors early Pure functions and immutability make code easier to reason about
Younger language with a smaller community than Erlang or Elixir	Steep learning curve for programmers used to imperative languages Lazy evaluation can make performance harder to predict
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: BSD-3-Clause
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.