AxonSheet is an AI-powered Microsoft Excel add-in that automates data extraction, table generation, and bulk cell filling using a bring-your-own-key model. It can process Word and Markdown documents into structured spreadsheet rows, fill missing data based on table context, and generate new columns or rows from natural language prompts. A built-in deep research agent fetches web data directly into Excel sheets, while an audit feature flags inconsistencies and leaves comments in cells. AxonSheet is available as a one-time purchase with lifetime access and includes all future updates.