gRPC is an open source remote procedure call (RPC) system initially developed at Google.
gRPC is a framework to efficiently connect services and build distributed systems.
It is focused on high performance and uses the HTTP/2 protocol to transport binary messages.
It is relies on the Protocol Buffers language to define service contracts.
https://learn.microsoft.com/en-us/aspnet/core/grpc/comparison?view=aspnetcore-7.0