Soldat is open source now: https://github.com/soldat/soldat https://news.ycombinator.com/item?id=26058312
Unfortunately, I don't really find the time anymore. It was really fun working on it, but it took an incredibly amount of time, and now my focus shifted to many other things (deep learning, family).
I probably should release some updated binaries at some point though, such that it works properly on more recent OS.