REST vs gRPC vs Thrift for Microservices

Choosing a service interface starts with understanding the systems that will call it. Consider an inventory service supporting a partner portal, a checkout backend, and a warehouse system built on an established RPC platform. The partner wants easy HTTP integration, checkout needs predictable service calls, and the warehouse team already has generated clients and operational tooling. One interface choice may not serve all three equally well.

REST, gRPC, and Apache Thrift offer different ways to define and operate service boundaries.

This chapter compares them using the same business operation, then examines the client, reliability, performance, and migration considerations that should drive a decision.