The spreadsheet engine for agentic products
Fast, rigorously tested, and quick to integrate. Agents call spreadsheet operations directly instead of burning tokens generating code. Familiar UI surfaces drop in when humans need to read or edit.
npm install @grid-is/spreadsheet-engineInstall GRID's spreadsheet skills:
npx -y skills add GRID-is/skills -g --all
Then create a React-based spreadsheet editor that uses GRID's packages for the heavy-lifting. Allow the user to drag-and-drop an .xlsx to open it, edit cells, and download an updated .xlsx file.Built with an agent, running on the engine
A coding agent built this mortgage amortisation UI on the GRID engine, using a financial analyst's Excel model. Drag the sliders and watch hundreds of cells recalculate in real time, rendered in the chart and our Spreadsheet Viewer.
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Our products
The engine your agents need. The UI surfaces your users expect.
Spreadsheet Engine
Spreadsheet logic, running natively inside your application. A headless engine that sits at the core of what we build, and everything you can build with us. Fast, accurate and compatible with Excel and Google Sheets out of the box.
The bridge between LLMs and spreadsheets
Spreadsheets are deceptively complex, and language models are unreliable at their mechanics. To read or modify one, an LLM has to generate a fresh batch of code each time, slow to generate, costly in tokens, and failure-prone as complexity grows.
GRID gives your agent a structured interface to read cells, apply changes, and recalculate with a function call, not generated code. Calls run against the GRID engine, so results stay accurate and consistent, with the same deterministic recalculation as Excel and Google Sheets.
GRID in the real world
Major investment banks
An Excel add-in the engine keeps accurate
Working with an AI platform used at major investment banks, we built an Excel add-in where the model works through GRID instead of acting on Excel directly. The engine sandboxes the spreadsheet and catches errors before anything touches the file, so the model generates and edits reliably.
Leading LLM provider
Spreadsheet logic the model can call directly
A leading LLM provider builds on GRID at the core of its spreadsheet capabilities. Instead of generating brittle code to read or modify a sheet, the model calls a structured interface backed by GRID's deterministic engine, which keeps spreadsheet-driven workflows reliable as they scale.
Get started now
Install the engine from npm with a free evaluation license and start building today. When you are ready to ship, talk to us. Most teams are surprised how quickly they go from first contact to production, with direct support from the GRID team throughout.