Why I like gRPC?

I have started using gRPC for service to service communication between Microservices and I am liking it so far. 

I still prefer to expose APIs to the external world(browser, mobile, or  third-party) using either REST or GraphQL. I am aware that you can use gRPC in Mobile apps and you can use grpc-web in web frontends. But, I have not used gRPC for those use cases yet.

I have earlier used REST(JSON over Http) and/or some form of Event-driven communication for service to service communication. They both work but the programming model leaves much to be desired.

gRPC is a HTTP/2 based modern and efficient inter-process communication style developed by Google. It is heavily used at Google and many other major tech companies such as Square, Lyft, Netflix, CockroachLabs, Salesforce, and many others.

As shown in the picture below gRPC builds on top of HTTP/2 and SSL as the efficient and secure transport layer. It uses Protocol Buffer for defining API contracts and efficient serialization. gRPC core provides the framework to do efficient service to service communication. gRPC tooling generates clients and servers that are used by the application tier.

Now that we understand gRPC basics I will share my reasons to prefer gRPC for service to service communication.

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