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Head-to-head · gRPC Tools

grpcui vs GripMock

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score grpcui #5 in gRPC Tools 8.3/10 Open source Free plan✓ 1 of 6 features Visit grpcui
GripMock #8 in gRPC Tools 8.0/10 Open source ✓ 4 of 6 features Visit GripMock

grpcui leads on 0 checks, GripMock on 0, and 5 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoregrpcui · 8.3/10
  • Free planonly grpcui
  • Most featuresGripMock · 4 of 6

grpcui scores higher on our rubric for grpc tools: 8.3 against 8.0 out of 10; our editors rank them #5 and #8.

On deployment model, grpcui gives you Desktop where GripMock offers Self_hosted.

grpcui is the better fit for developers wanting a browser-based gRPC client. GripMock is the better fit for teams building sophisticated self-hosted gRPC mocks.

  • grpcui fits best

    Developers wanting a browser-based gRPC client

  • GripMock fits best

    Teams building sophisticated self-hosted gRPC mocks

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature grpcui 8.3/10 Visit ↗ GripMock 8.0/10 Visit ↗
At a glance
Editor score 8.3 8.0
Ranking #5 in gRPC Tools #8 in gRPC Tools
Best for Developers wanting a browser-based gRPC client Teams building sophisticated self-hosted gRPC mocks
Pricing model Free Free
Starting price Open source Open source
Free plan ✓ (best) Not checked yet
Free trial — —
Deployment Self-hosted, Desktop Cloud, Self-hosted, Desktop, Browser extension
Platforms Web, macOS, Linux Web, Windows, macOS, Linux
Support Community, Docs Docs
Built for Solo, Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features grpcui 1/6 · GripMock 4/6
gRPC-Web support Not checked yet ✓ (best)
Server reflection ✓ ✓
Mock server Not checked yet ✓ (best)
Protobuf editor Not checked yet Not checked yet
Load testing Not checked yet Not checked yet
CI integration Not checked yet ✓ (best)
Specs
Deployment model Desktop Self_hosted
Our review
Pros
  • Discovers services through reflection, .proto files, or protosets
  • Builds dynamic forms for protobuf messages, maps, and oneofs
  • Supports plaintext, TLS, mutual TLS, metadata, and response details
  • Mocks unary and all three gRPC streaming modes
  • Supports schema validation, flexible matching, errors, and delays
  • Includes REST, web UI, Docker, GitHub Actions, and gateway support
Cons
  • Bidirectional streaming RPC methods have limitations
  • Focused on request exploration rather than automated testing
  • Requires a command-line application to serve the local browser UI
  • Requires a self-hosted deployment model
  • Stub definitions are configured in YAML or JSON
  • Focused on gRPC services rather than broader API testing
Our verdict

grpcui is an open-source command-line application that serves a browser-based interface for interacting with gRPC servers. It is aimed at developers who need to inspect services and compose requests without relying only on manually…

Read the review →

GripMock is an open-source gRPC mock server for developers and QA teams working with service contracts and automated tests. It can load APIs from .proto files, compiled protobuf descriptors, Buf Schema Registry modules, or live gRPC server…

Read the review →
  1. grpcuigRPC Tools 8.3Open source
  2. GripMockgRPC Tools 8.0Open source

Strengths and trade-offs

  • grpcui — where it wins

    • Discovers services through reflection, .proto files, or protosets
    • Builds dynamic forms for protobuf messages, maps, and oneofs
    • Supports plaintext, TLS, mutual TLS, metadata, and response details

    Where it doesn't

    • Bidirectional streaming RPC methods have limitations
    • Focused on request exploration rather than automated testing
    • Requires a command-line application to serve the local browser UI

  • GripMock — where it wins

    • Mocks unary and all three gRPC streaming modes
    • Supports schema validation, flexible matching, errors, and delays
    • Includes REST, web UI, Docker, GitHub Actions, and gateway support

    Where it doesn't

    • Requires a self-hosted deployment model
    • Stub definitions are configured in YAML or JSON
    • Focused on gRPC services rather than broader API testing

More comparisons

All gRPC tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update