Privacy Policy

Excel LLM Add-in. Last updated: 2026.

The Excel LLM Add-in runs entirely on your device inside Excel. It has no backend server of its own — the add-in files are served as static content, and it does not collect, store, or transmit your data to us.

What the add-in sends, and to whom

When you use a function such as =LLM.PROMPT(...), the text you provide is sent directly from your device to the LLM provider you configure (e.g. OpenAI, Mistral, Nebius, Scaleway, OpenRouter, or a local Ollama server), or to the proxy URL you configure. That provider's own privacy policy governs how they handle it. We are not an intermediary and never receive your prompts or responses.

Where your settings and keys are stored

Your provider, model, and any API keys you enter are stored locally on your device via Office's per-user add-in storage (OfficeRuntime.storage). They are not sent anywhere except, as an Authorization header, to the provider or proxy you chose when you invoke a function. For cloud providers, using the optional proxy keeps keys on your own server instead of in the workbook.

No tracking

The add-in contains no analytics, advertising, or third-party trackers.

Contact

Questions or issues: github.com/CrispStrobe/ExcelLLMAddin.