It compiles to Erlang too. The language itself is extremely similar to Haskell but with some refinements around some of the legacy baggage Haskell suffers from (string handling for example). Some differentiators include: strict evaluation by default, handling of record types, an extremely modular package policy (nothing is imported by default), and a lack of some things that can potentially make Haskell esoteric at times (template Haskell for example). The community is small but dedicated. Documentation can be very minimal in a lot of cases, so it’s not a beginner friendly language, but once you are up and running, it’s a pretty awesome experience overall.