Fiddler Everywhere vs Proxygen

Fiddler Everywhere captures, inspects, modifies, and replays HTTP/S traffic across applications, services, and devices. Capture options include system proxy, network, browser, and terminal modes. It decodes HTTP/2, SignalR, WebSockets, MessagePack, SSE, gRPC, and Protobuf. Users can compose API requests, replay traffic, set breakpoints, and create rules that change requests or responses. Its MCP server connects to coding assistants and agent-powered IDEs, with setup documented for VS Code, Cursor, Claude Code, GitHub Copilot CLI, and Codex CLI. Output sanitization can remove sensitive information before data is shared with a model. The product is aimed at developers, QA staff, and support engineers. Desktop downloads are listed for Windows 10 and 11, macOS 11 or later on Intel or Apple Silicon, and Ubuntu 20 or later; Android and iOS are also listed as platforms. A 10-day trial is available, but there is no free plan. Lite costs $10 a month and Pro $19 a month, both billed monthly; Enterprise costs $37 a year, billed annually.

Proxygen has no write-up on Specifiction yet; its figures are above.