BloomRPC Extended review
A free, open-source desktop client with broad gRPC and gRPC-Web coverage.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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.
BloomRPC Extended pros and cons
- 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
BloomRPC Extended fact sheet, pricing and score →
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