[Towaway69]

If you want to keep the syntax of Ruby but try a new language, then I would suggest having a look at Elixir.

It’s a completely different paradigm having been built on the ideas of Erlang with the syntax of Ruby.

[kyledrake]

The language I thought was pretty cool and similar was Crystal, but I've never run into the use case to try it, because I've never had something I couldn't handle with Ruby itself. Performance in my world is rarely a bottleneck, and I would not want to build a very large web app with a lot of complex business logic with it.