Capnproto by Kenton Varda <https://capnproto.org https://capnproto.org>. There have certainly been other contributors <https://github.com/capnproto/capnproto/b

Capnproto by Kenton Varda <https://capnproto.org https://capnproto.org>. There have certainly been other contributors <https://github.com/capnproto/capnproto/blob/master/CONTRIBUTORS https://github.com/capnproto/capnproto/blob/master/CONTRIBUT...>, but Kenton does most of the development and maintenance on his own. There are few things I lament more than having to spin up on a new serialization / file format and it isn't using Capnproto or Protobufs or some similar invention. Capnproto has truly spoiled me in terms of how consistent and feature rich it is for what seems like a "simple" task.