We use all 3 for network communications.

Here is an aeron microbenchmark: https://github.com/benalexau/rpc-bench

Of note is akka uses it for its internal remoting: http://blog.akka.io/artery/2016/12/05/aeron-in-artery

We will be using it for RPC and distributed deep learning: http://engineering.skymind.io/interview-with-adam-gibson-cre...