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Head-to-head · gRPC Tools

BloomRPC Extended vs grpcui

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score BloomRPC Extended #4 in gRPC Tools 8.5/10 Free plan Free plan✓ 2 of 6 features Visit BloomRPC
grpcui #5 in gRPC Tools 8.3/10 Open source Free plan✓ 1 of 6 features Visit grpcui

BloomRPC Extended leads on 0 checks, grpcui on 0, and 3 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreBloomRPC Extended · 8.5/10
  • Free planboth
  • Most featuresBloomRPC Extended · 2 of 6

BloomRPC Extended scores higher on our rubric for grpc tools: 8.5 against 8.3 out of 10; our editors rank them #4 and #5.

BloomRPC Extended is the better fit for free desktop users needing complete RPC coverage. grpcui is the better fit for developers wanting a browser-based gRPC client.

  • BloomRPC Extended fits best

    Free desktop users needing complete RPC coverage

  • grpcui fits best

    Developers wanting a browser-based gRPC client

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Side by side

Feature BloomRPC Extended 8.5/10 Visit ↗ grpcui 8.3/10 Visit ↗
At a glance
Editor score 8.5 8.3
Ranking #4 in gRPC Tools #5 in gRPC Tools
Best for Free desktop users needing complete RPC coverage Developers wanting a browser-based gRPC client
Pricing model Free Free
Starting price Free plan Open source
Free plan ✓ ✓
Free trial — —
Deployment Desktop Self-hosted, Desktop
Platforms Windows, macOS, Linux Web, macOS, Linux
Built for Solo, Small business Solo, Small business, Mid-market, Enterprise
Features BloomRPC Extended 2/6 · grpcui 1/6
gRPC-Web support ✓ (best) Not checked yet
Server reflection ✓ ✓
Mock server Not checked yet Not checked yet
Protobuf editor Not checked yet Not checked yet
Load testing Not checked yet Not checked yet
CI integration Not checked yet Not checked yet
Specs
Deployment model Desktop Desktop
Our review
Pros
  • Supports unary, server-streaming, client-streaming, and bidirectional calls
  • Includes gRPC-Web, reflection, TLS/SSL, metadata, and environments
  • Runs on Windows, macOS, and Linux as open-source desktop software
  • 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
Cons
  • Does not provide verified testing features
  • Does not include CI workflows
  • Lacks mocking and load-testing features
  • 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
Our verdict

BloomRPC Extended is an open-source desktop GUI client for developers who explore and query gRPC services. It covers native unary, server-streaming, client-streaming, and bidirectional RPC calls, while also supporting gRPC-Web. The…

Read the review →

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 →
  1. BloomRPC ExtendedgRPC Tools 8.5Free plan
  2. grpcuigRPC Tools 8.3Open source

Strengths and trade-offs

  • BloomRPC Extended — where it wins

    • Supports unary, server-streaming, client-streaming, and bidirectional calls
    • Includes gRPC-Web, reflection, TLS/SSL, metadata, and environments
    • Runs on Windows, macOS, and Linux as open-source desktop software

    Where it doesn't

    • Does not provide verified testing features
    • Does not include CI workflows
    • Lacks mocking and load-testing features

  • 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

More comparisons

All gRPC tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update