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grpcmock

Free#19 of 24 in gRPC Tools

grpcmock: A focused open-source choice for Java teams testing unary and streaming gRPC calls. Ranked #19 of 24 in gRPC Tools by our editors (6.5/10); pricing: Open source; best for java and Spring teams mocking gRPC in tests.

6.5/10Editor score

Visit grpcmock

grpcmock6.5 Visit grpcmock

At a glance

Editor score
6.5 / 10
Pricing
Open source
Best for
Java and Spring teams mocking gRPC in tests
Paid from
Free
Facts checked
20 Sep 2026

Where it wins
- Fluent Java stubbing with header and request-body matching
- Supports unary, server-, client-, and bidirectional streaming RPCs
- Spring Boot and JUnit 5 integrations with invocation verification
Where it doesn't
- Self-hosted deployment only
- Focused on Java-based test suites
- No commercial pricing tiers or hosted service

Our verdict on grpcmock

grpcmock is an open-source Java library for mocking gRPC service endpoints in unit and integration tests. It is aimed at Java teams that need programmable test doubles for gRPC calls, particularly projects using Spring Boot and JUnit 5. The fluent API supports method stubbing, header and request-body matching, configurable response delays, and assertions on invocations and request counts. Its self-hosted deployment model keeps the tool within the test environment rather than providing a hosted mock service.

The standout capability is its coverage of gRPC interaction patterns. grpcmock supports unary RPCs as well as server-streaming, client-streaming, and bidirectional-streaming RPCs. That breadth matters when tests need to represent more than a simple request-and-response exchange. Response delays can model timing conditions, while invocation verification and request-count assertions help validate how a client interacts with the mocked service. These features make grpcmock suitable for tests that check both returned behavior and call patterns.

Its ecosystem fit is strongest for Java projects built around Spring Boot and JUnit 5, which have dedicated integrations. The project is published under the Apache-2.0 license and is designed for self-hosted use, with in-process server options available for test execution. grpcmock is a strong fit for teams that want a focused Java library covering streaming and unary gRPC mocks without a separate hosted platform. Teams seeking a language-agnostic tool, a managed service, or deployment beyond their own test environments should choose an alternative.

Your product? Our editors can test grpcmock in depth and publish a review, labelled as paid · from $149/mo →

grpcmock pricing

Plans Open sourceFree Free to use — no paid tier required for the core job.

See plans on grpcmock.org

grpcmock fact sheet

Free plan	Not verified
Paid from	Free
Deployment model	Self_hosted
gRPC-Web support	Not verified
Server reflection	Not verified
Mock server	Yes
Protobuf editor	Not verified
Load testing	Not verified
CI integration	Not verified
Deployment	Self-hosted
Support	Docs
Built for	Solo, Small business, Mid-market (editorial estimate)
Integrations	2 integrations: Spring Boot, JUnit 5
Pricing	Open source
Website	grpcmock.org
Facts checked	20 Sep 2026

grpcmock integrations

grpcmock lists 2 integrations on its own site.

Spring Boot
JUnit 5

Alternatives to grpcmock

See all grpcmock alternatives →

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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used grpcmock for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.

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Featured on iTechGuides

grpcmock is listed in our gRPC Tools directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update