FintX vs Granc

FintX is a native desktop gRPC test bench for functional and performance testing, available on Linux, macOS and Windows. Functional tests compare actual responses with expected responses and show a visual diff. Load testing supports incremental, constant and burst scenarios. FintX can mock external gRPC services, including unary and streaming methods, with responses customized through C# scripting. It generates test data from protobuf definitions using Faker.js/Bogus. To create a gRPC client, users can supply a.proto file or the HTTP location of a gRPC Reflection Server; generated C# client code is compiled into an assembly and saved locally for reuse. Data is stored as text files on the local machine. The free Community plan includes unlimited gRPC clients, request auto-save, import and export, method tabs, a JSON editor and projects. Professional is $100 per seat and adds functional tests, validation rules, visual diffs, test collections, summarized reports and performance testing. Enterprise is $995 for unlimited users. The linked privacy policy contains placeholder text rather than substantive privacy details.

Granc is a free, open-source Linux command-line tool written in Rust for dynamic gRPC calls. It sends JSON payloads without requiring service Protobuf files to be compiled into the client, translating JSON to Protobuf and back at runtime. Using a descriptor, it detects unary, server-streaming, client-streaming, and bidirectional RPCs. Schemas can come from server reflection or a local binary FileDescriptorSet file. Commands list services and describe services, messages, and enums. Granc also creates static Markdown documentation cross-linked between services and types. Requests may include custom headers such as authorization or tracing metadata, and JSON is validated before transmission. The core logic is available as a separate library crate for integration tests, proxies, and automation tools. Installation is documented with cargo install --locked granc. The project has moved to Codeberg, while its GitHub repository was archived on March 9, 2026. It is offered under Apache License 2.0 or MIT. TLS support with configurable roots and client identity is on the roadmap.