gRPC is primarily used with backend services.

▪ Synchronous backend microservice-to-microservice

communication where an immediate sync response is required to

continue processing.

▪ Polyglot environments that need to support mixed programming

platforms.

▪ Low latency and high throughput communication where performance

is critical.

▪ Point-to-point real-time communication that gRPC can push

messages in real time and requires to support for bi-directional

streaming.

▪ Network constrained environments which requires less bandwith

usage cases, binary gRPC messages are always smaller than textbased JSON message.

https://medium.com/@sankar.p/how-grpc-convinced-me-to-chose-it-over-rest-30408bf42794