gRPC

gRPC is a high-performance, open-source Remote Procedure Call (RPC) framework for efficient, polyglot service communication.

gRPC (gRPC Remote Procedure Calls) is a modern, open-source RPC framework developed by Google (initially as Stubby) for connecting services across and within data centers. It leverages HTTP/2 for transport (enabling bi-directional streaming) and utilizes Protocol Buffers (Protobuf) as its Interface Definition Language (IDL) for efficient, binary serialization. This contract-first approach ensures strong type safety and generates idiomatic client/server stubs for multiple languages (e.g., Go, Java, Python). The result: a fast, low-latency solution ideal for microservices architectures and connecting mobile clients to backend systems (used by Netflix, Square, and others).

https://grpc.io