gRPC logo

gRPC is a modern open source high performance RPC framework.

It was released by Google in 2016 as the next version of an internal project called Stubby.


gRPC allows you to describe the service and generate both code for clients and a “stub” for the server in popular programming languages.

gRPC example

Protobuf is used to describe the service. Unary “request-response” messages as well as streams of messages are supported.

service HelloService {
  rpc SayHello (HelloRequest) returns (HelloResponse);

message HelloRequest {
  string greeting = 1;

message HelloResponse {
  string reply = 1;

Can be particularly useful where there are several internal services communicating with each other. Due to the complex use of HTTP/2, gRPC is not supported by browsers.