LogiSheetsWhere AI and people work together

but it's also perfectly happy just opening your .xlsx.

For people and AI

A person sees an ordinary grid. An agent sees tables it can name, columns it understands, and rules that say when a value is wrong. One file, not two.

Real Excel files

Opens and saves .xlsx — formulas, styles, merged cells, several sheets. What you build here opens in Excel, and what Excel made opens here.

Open source

MIT licensed, engine and UI. Runs in the browser, on Node, or natively in Rust — on your own machine, with your own files.

Built to extend

One API across Rust, Node and the browser. Write a small app once and it runs in the sheet, on a server, and as an AI tool.