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gRPC vs REST: How to Choose the Right Protocol for Service Communication

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A technical comparison published on DEV Community breaks down the key differences between REST and gRPC for service-to-service communication. REST transmits human-readable JSON over HTTP/1.1 and is universally supported by browsers, making it well-suited for public APIs and external clients. gRPC uses binary Protocol Buffers over HTTP/2, delivering roughly 5–10 times better performance and native bi-directional streaming, which makes it ideal for internal microservice communication. The guide recommends a hybrid architecture where an API gateway handles external REST traffic while internal services communicate via gRPC for speed and type safety. Developers are advised to avoid gRPC when browser clients need direct access or when teams lack familiarity with the required .proto schema format.

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