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BloomRPC Extended

Free#4 of 24 in gRPC Tools

BloomRPC Extended: A free, open-source desktop client with broad gRPC and gRPC-Web coverage. Ranked #4 of 24 in gRPC Tools by our editors (8.5/10); pricing: Free plan; best for free desktop users needing complete RPC coverage.

8.5/10Editor score

Visit BloomRPC

BloomRPC Extended8.5 Visit BloomRPC

At a glance

Editor score
8.5 / 10
Pricing
Free plan
Best for
Free desktop users needing complete RPC coverage
Free plan
Yes
Paid from
Free
gRPC-Web support
Yes
Facts checked
20 Sep 2026

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

Our verdict on BloomRPC Extended

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 application is available for Windows, macOS, and Linux, making it suitable for developers who want a local graphical interface rather than a command-line workflow. Its LGPL-3.0-or-later license also fits teams that prefer open-source desktop tooling.

The published product details show a broad set of service-development features without a paid plan structure. Users can import and manage .proto files, use server reflection, edit metadata, configure environments, and connect through TLS/SSL. Draggable tabs support work across multiple services in one desktop interface. This combination makes BloomRPC Extended particularly useful for inspecting service definitions, sending requests across all supported streaming modes, and switching between environments while working locally.

Its main boundary is scope. BloomRPC Extended is focused on interactive desktop access to gRPC services rather than a broader testing or delivery platform. It does not include verified testing, CI, mocking, or load-testing features, so teams that need automated validation, pipeline integration, simulated services, or performance testing should choose a tool built around those workflows instead. Developers seeking a free desktop client with extensive RPC-mode coverage, gRPC-Web, reflection, and protocol configuration should pick BloomRPC Extended; teams needing automation or load-focused capabilities should look elsewhere.

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

BloomRPC Extended pricing

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

See plans on github.com

BloomRPC Extended fact sheet

Free plan	Yes
Paid from	Free
Deployment model	Desktop
gRPC-Web support	Yes
Server reflection	Yes
Mock server	Not verified
Protobuf editor	Not verified
Load testing	Not verified
CI integration	Not verified
Deployment	Desktop
Platforms	Windows, macOS, Linux
Built for	Solo, Small business (editorial estimate)
Pricing	Free plan
Website	github.com
Facts checked	20 Sep 2026

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Featured on iTechGuides

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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