For your own sanity, please stay away from Flatbuffers. The key here is 'doesn't do parsing'. I used it, and wound up writing a ton of extract code to unpack things in the way I wanted. Behind the scenes everything in FlatBuffers is stored in a byte array or byte buffer. It can be made to work, but protobuffs worked better for me.

Caveats:

1) I needed to work in C++ and Java

2) I was transporting serialized messages over ZeroMQ