DiffGuardian

DiffGuardian is a desktop application for macOS, Windows and Linux that helps engineers, product managers and others understand code changes written by AI agents. Users can ask about a pull request by voice and hear a walkthrough while the relevant code is highlighted, read a written feature-by-feature walkthrough, or view a graph of the files and modules a change touches, built from the diff alone. It works with the user’s own keys for Anthropic, OpenAI, Gemini or OpenRouter, or with local models, and the maker says code does not pass through its servers. Its pricing section lists a free plan with 1 connected public repository and 5 AI reviews a month on local models only, Pro at $8 a month, and Team at $8 per seat a month with a minimum of 3 seats; Enterprise with single sign-on is marked as coming soon. The operating company and location are not stated. The maker presented it on Hacker News on 8 October 2026. Buyers should note that model usage is paid separately to the chosen provider.

Not yet independently verified: The launch date rests on the maker’s own Show HN post of 8 October 2026 (late evening, UTC). Every detail comes from the maker’s own site; the operating company and its location are not stated, and no independent report was found. We will update this when it can be confirmed, and remove this note.