grpcmock-go vs ProtoCall

grpcmock-go is a free, MIT-licensed Go module providing gRPC testing utilities. It helps tests mock gRPC servers, configure expectations for methods, headers, and payloads, and invoke client calls. Supported methods include unary, client-streaming, server-streaming, and bidirectional-streaming patterns. Request matching can use exact values, regular expressions, JSON, or custom matchers. Mock responses may return payloads, errors, or custom-handler results, and streaming client invocations can use custom handlers. Services can be registered from generated Go code, service instances, or individual methods when generated code is unavailable. The project recommends MockServerWithBufConn for in-memory application testing, with examples using bufconn listeners and context dialers. Installation uses `go get go.nhat.io/grpcmock`, and Go 1.25 or later is required. GitHub lists v0.34.0, released December 12, 2025, as the latest release. The Open-source Go module plan costs nothing.

ProtoCall is a cloud web app intended to simplify the steps of building APIs with gRPC. It runs in a browser without installation and organizes proto files into workspaces, where packages and imports resolve within one namespace. Users can create a workspace by importing proto files manually or bring in a GitHub repository they own, collaborate on, or can access through organization membership. Imports can track repository changes automatically. ProtoCall supports one repository per workspace, not a combination of repositories. The web app relies on ProtoCall Agent, a local webserver, for outbound requests that browsers cannot make directly because of CORS restrictions. The agent applies its own CORS rules and additional authentication to restrict communication from unauthorized non-browser processes. The agent runs through a Docker container on Windows and macOS, and as a binary executable on Linux. The Free plan costs nothing and supports GitHub imports and manually created workspaces. Listed platforms are Linux, macOS, web, and Windows.