NATS is a solution I have used in the past that supports Request/Reply semantics (I actually really enjoyed NATS). I am not sure Kinesis fits the traditional mo

NATS is a solution I have used in the past that supports Request/Reply semantics (I actually really enjoyed NATS). I am not sure Kinesis fits the traditional mold of a "message bus", but it certainly can be used as such, and I have used it as a message broker extensively. Kinesis with its tight integration with lambda can be trivially modified to add Request/Reply semantics with a lambda, but I will concede your point Kinesis is designed to be many ways in and one way out.