[iomcr]

Crystal does a better job with making portable binaries. For example I have written an app that's a 20MB alpine docker container. A comparable app written in Elixir used an 800MB alpine docker container.

I think Elixir is one of crystal's top competitors, but only for servers. Probably you'd never leave Elixir to write a webserver in Crystal. That's just Erlang's specialty. You would leave golang, Ruby, python, PHP, etc. for crystal though, because of the type system, performance, threads, binary, etc..

I've actually started using crystal to write the kinds of scripts people would normally use python for, despite it not being a scripting language.