How does this compare with Flight Recorder? As of Java 11, Flight Recorder and its analysis tools (JDK Mission Control, formerly Java Mission Control) are free and open source:

https://github.com/openjdk/jmc

I have found Flight Recorder light weight enough to have it always enabled on production services. I didn't start using it until last year because it was a commercial feature on older Java releases.

EDIT: another comment says that this is based on Flight Recorder. The value add proposition is around the interface rather than the instrumentation, then. I think there is an opportunity there. JMC is fairly heavyweight and doesn't have good visualization/exploration tools for everything.