Modern microservice systems usually need two traffic-control layers: an API gateway for external client traffic and a service mesh for internal service-to-service traffic. The key implementation decision is not always “service mesh vs API gateway,” but where each one belongs in your architecture.
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In this guide, you’ll compare API gateways and service meshes by traffic scope, responsibilities, deployment model, and operational use cases. You’ll also see practical configuration examples and how API design/testing tools like Apidog fit into either approach.
What Is Service Mesh vs API Gateway?
Before choosing a tool, separate the two traffic paths in your system:
