Last updated 06-30-2026
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GRID
GRID is a spreadsheet engine built for agentic products. Developers install @grid-is/spreadsheet-engine from npm and embed Excel-compatible calculations directly in browsers, Node.js servers, or on-premise infrastructure. Agents call structured spreadsheet operations instead of generating code, which cuts token use and keeps recalculation deterministic.
The platform ships as a family of npm packages: a headless engine for logic, a themeable Spreadsheet Viewer for read-only display, a Spreadsheet Editor for in-product editing, and an Excel add-in for domain-specific skills inside Excel. GRID also publishes agent skills (npx skills add GRID-is/skills) so coding agents like Cursor and Claude Code can scaffold spreadsheet editors quickly.
GRID targets software teams that need spreadsheet reliability inside their own products. The engine runs nearly 200,000 automated unit tests and supports real-world Excel and Google Sheets compatibility. Major investment banks and a leading LLM provider use GRID as core spreadsheet infrastructure.
Founded in 2018 in Reykjavik, Iceland, GRID also offers Calculator Studio for interactive calculators built on spreadsheet models. Evaluation licenses are free for development and testing; commercial licenses are required when shipping to customers.
Headless TypeScript engine (
@grid-is/spreadsheet-engine) runs in browser, Node.js, or your own serversAgents read, write, and recalculate spreadsheets through structured calls instead of generated code
Spreadsheet Viewer and Editor npm packages render themeable UI inside your product without a backend
Excel add-in runs domain skills with the engine so models never corrupt the underlying workbook
Nearly 200,000 automated unit tests back Excel and Google Sheets compatibility
Structured agent interface avoids token-heavy code generation for spreadsheet tasks
Runs client-side or on-premise so spreadsheet data stays in your infrastructure
Broad npm package lineup covers engine, viewer, editor, and Excel add-in use cases
Heavy automated test suite targets Excel and Google Sheets parity
Commercial production use requires a paid license with sales contact
Spreadsheet Viewer is read-only; editing needs the separate Editor package
How do I get started with GRID?
Install `@grid-is/spreadsheet-engine` from npm with a free evaluation license. No signup is required. GRID also publishes agent skills you can install with `npx skills add GRID-is/skills` to scaffold a React spreadsheet editor. Docs live at docs.grid.is.
Is GRID compatible with Excel and Google Sheets?
Yes. GRID is built for deep compatibility with Excel and Google Sheets, covering functions, operators, and edge cases found in real workbooks. Existing spreadsheets can run without modification.
Where can the GRID engine run?
The engine runs in the browser, on a user's device, in Node.js, in the cloud, or on your own infrastructure. Running close to your app avoids server round-trips and keeps spreadsheet data inside your stack.
How does GRID work with AI agents and LLMs?
GRID exposes a structured interface so language models and agents read cells, apply changes, recalculate, and even generate spreadsheets through function calls rather than brittle generated code. Official GRID skills are available for coding agents.
Does GRID modify my original spreadsheet files?
No. By default the engine recalculates and analyzes models without altering the source file. The Spreadsheet Viewer also processes files client-side so data never leaves the browser.
What does GRID cost?
Every npm package ships with a free evaluation license for development, testing, and personal use. Commercial use in a shipped product or internal workflow requires a commercial license. Contact GRID through grid.is/license for pricing.
What UI components does GRID offer?
GRID provides a Spreadsheet Viewer for read-only display, a Spreadsheet Editor for in-product editing, and an Excel add-in. All are installable from npm and themeable to match your design system.