Side by side

grpc-wiremock vs Mediator

Both stand on grpc tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

grpc-wiremock

Free plan Self-hosted

grpc-wiremock provides contract-based mock generation, hot reload and a gRPC-to-HTTP proxy workflow in a self-hosted package. Its documented setup depends on Docker, and the repository does not describe security certifications or compliance.

Visit grpc-wiremock

Mediator

Free plan LinuxMacWindows

Mediator provides a free desktop proxy with schema-based gRPC message decoding and request redirection. Certificate setup is required for matching HTTPS inspection, and certificates are specific to each installation.

Visit Mediator

The facts

	grpc-wiremock	Mediator
Free plan	Yes	Yes
Open source	Not published	Not published
Runs on	Self-hosted	Linux, Mac, Windows
Lowest paid plan	Not published	Free or on request
Plans published	None	1
Maker	Not published	Not published
Website	github.com	github.com
On grpc tools	#22 of 24	#18 of 24

grpc-wiremock: what it does well

Generates mocks from proto and OpenAPI files.
Reloads mocks when contracts change.
Runs multiple mock APIs simultaneously.
Includes WireMock matchers and documented GUIs.
Free and licensed under Apache License 2.0.

What to know first

Self-hosted deployment uses a Docker container.
The documented proxy-generation workflow uses Go plugins.
The comparison document's criteria are still marked TODO.

Mediator: what it does well

Redirects traffic without client-code changes.
Parses messages when an API schema is available.
Supports three schema-source types.
Downloads are listed for Windows, macOS, and Linux.
Free under Apache-2.0.

What to know first

HTTPS inspection requires installing the generated root certificate.
A different installation requires reinstalling its certificate.
Message decoding depends on an available API schema.

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