NetworkSpy vs Probe

NetworkSpy is an application-level HTTP/HTTPS debugging tool for capturing and analyzing network traffic. It can intercept HTTPS, inspect request metadata, compare requests side by side, and let users edit and replay captured traffic. Breakpoints can pause or change live requests, and response mocking is supported. It also handles WebSocket message streaming and gRPC with Protobuf decoding. Its LLM analyzer visualizes streaming tokens, tracks token usage, and reports latency for each chunk; custom viewers can display proprietary binary formats or other structured data. NetworkSpy runs on macOS, Linux, and Windows, and physical iOS and Android devices can be configured to route traffic through it for inspection. The privacy policy says inspected traffic stays on the user's machine and is not collected or monitored. The free plan has limits on LLM token analysis and other features. Personal costs $18 a year, Professional $29 a year, Team Starter $49 a month, and Business $149 a month. An individual license is limited to one device.

Probe is a local HTTP/HTTPS proxy and API client for examining application traffic, editing requests and responses, creating mocks, and automating requests. It can capture traffic from phones, simulators, desktop apps, and terminal clients, then show headers, bodies, and timing. Breakpoints let users pause a request or response, change its headers or body, and continue or abort it. Map Local serves a local file or inline body for matching URLs; Map Remote forwards them to another host. Visual flows can chain requests, extract values, check results, branch, and loop, and run in the app, through REST API or MCP, or with a headless CLI. The API client supports HTTP and GraphQL, collections, environments, authentication, and history. It imports cURL or Postman and exports to Postman v2.1. Probe also includes an MCP server for compatible clients and file browsing and transfers over SFTP, FTP/FTPS, S3, and WebDAV. It is available for Android, iOS, macOS, Windows, and API use. The free plan costs nothing.