I used optaplanner at a previous gig before working at nextmv — we don’t offer the same type of “choose your own adventure” tooling compared to optaplanner yet, but it’s much more lightweight to get, say, a routing model shipped in to production IMO. (Java shops notwithstanding).
The -Dnative build compiles your java code natively into an native executable that boots up in milliseconds (instead of seconds like a JVM). This is the result of strong collaboration between us (the OptaPlanner team) and the Quarkus team and we have more features in the pipeline.
Nextmv has just the right level of abstraction needed for software engineers. Took us very little time to get a production model running.
I would have maybe liked Optaplanner if I could peer through all the layers of Java, it seems like a thick Java sandwich with some optimization somewhere (but I have to say I lost it when you can turn your model into XML apparently)