Is there an option to use KubeMQ open source?
I see there was a commercial version but is there a similar open source option for kubernetes?
Sources
As you've already done some research I can confirm that KubeMQ is a paid solution and it's not possible to use it for free for production usage (it's possible though to have for development purposes for half a year - license details can be found here)
There are good alternatives you can focus on:
I think they have an open-source edition now with Apache 2.0 license
KubeMQ Community is the open-source version of KubeMQ, the Kubernetes native message broker.
as in this link link