I know you already mentioned it, but gRPC does support QUIC. If it helps at all, the C++ surface wraps a C core [1], which supports QUIC via an opt-in Cronet d

I know you already mentioned it, but gRPC does support QUIC. If it helps at all, the C++ surface wraps a C core [1], which supports QUIC via an opt-in Cronet dependency [2][3]. If you wanted to roll your own messaging framework, you'd probably want to build on top of at least Cronet, if not gRPC core. [1]: The pure C core: https://github.com/grpc/grpc/tree/master/src/core https://github.com/grpc/grpc/tree/master/src/core [2]: A visualization of the stacks: https://grpc.io/blog/grpc-stacks/ https://grpc.io/blog/grpc-stacks/ [3]: https://github.com/grpc/grpc/tree/master/src/core/ext/transport/cronet https://github.com/grpc/grpc/tree/master/src/core/ext/transp...