I'd needed RPC framework for few of my projects but every time I'd considered gRPC, I ended up walked away from it. The big issue is that gRPC has a huge amount of dependencies and it tries to a lot of things, many of them might be irrelevant for you but would cause extra headache anyway. When all need is just serializing your stuff and send over the wire, there are much better lightweight frameworks. For C++, I think RpcLib is one of the best. It doesn't even require maintaining .proto file, do "compile" of schems every time you change something, etc. The moral of the story is that always look around instead of just going for the most popular solution first.