I think the software aspects of JetKVM are open source? See: https://github.com/jetkvm

Also they say they are open sourcing the reference implementation of the "JetKVM OS Services" and the firmware of the "JetKVM Mini".

My point is more that it is way easier to make mistakes in source than it is to review said source in a project like this. So, to me, it is kind of risky to use something very green that is meant to be used as a network appliance more or less.