Why gRPC? When REST Is Not Enough
grpcmicroservicesapi-design
Why gRPC? When REST Is Not Enough
April 29, 2026
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Paal Gyula
gyula@pilab.hu
Understanding when and why to choose gRPC over REST for your microservices architecture.
Introduction
gRPC is a high-performance RPC framework that uses Protocol Buffers for serialization. But when should you actually use it?
Key Topics to Cover
- gRPC vs REST: Performance comparison
- Protocol Buffers and schema evolution
- Streaming: unary, server, client, and bidirectional
- When gRPC makes sense (internal services, low latency)
- When REST is still the right choice (public APIs, browser clients)
- gRPC-Web for browser compatibility
- Tooling and code generation
- Real-world migration stories