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

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