> cap'n'proto is ancient, I mean... not compared to protobuf. > unmaintained, The C++ implementation is well-maintained and heavily used by its own maintaine

> cap'n'proto is ancient, I mean... not compared to protobuf. > unmaintained, The C++ implementation is well-maintained and heavily used by its own maintainers (e.g. me). Other implementations are maintained to varying degrees, since each implementation has a different maintainer. Agreed the C# implementation isn't maintained. > You will be better served by gRPC Well, this really depends, considering that Cap'n Proto's RPC system is quite different and far more expressive than gRPC.