I did a hands-on last year at Devoxx. It's not really 'Graalvm based'. It's a Spring-boot like framework that focusses on doing things compile time rather then runtime, so it's a better fit for Graalvm. But Spring is also moving into that direction and has way more features. You probably can use bit's of it in Clojure, and you could call Clojure from micronaut, not sure if you want that.