Comment by hellofunk

Don't forget that with Clojure, anything you would do in Java or on the JVM using any language, you can do in Clojure. So for example, Scala has Akka, a powerful actor model. And of course, you can use that in Clojure if you want:

https://github.com/gaverhae/okku

(This is just one way to use Akka).