KubeMQ supports a number of popular communication patterns (Pub/Sub, sending events, event sourcing, even CQRS commands and queries). It has client libraries for programming languages I use (C# and Go) and the ability to use REST API. It also provides a dashboard to monitor activity.

lightweight 30 mb binary(especially comparing to Kafka), easy to install, feat well with service mesh( in my case it was linkerd), grpc interface from the box

I like best that it provides so many messaging patterns in one product, which is extremely useful for our use case. It was also great to have such support from the company, they answered all our questions and were very helpful in the process.