Why finance agents need a spreadsheet engine
Finance still runs on spreadsheets. AI has to work with them, not around them
Investors build and defend their models in spreadsheets. Accountants close the books and sign off in them. Same reason on both sides: with real money and real accountability on the line, every number has to be checkable by the person who answers for it, not the output of a black box. Spreadsheets are here to stay, but they need to be made fully accessible to AI in a reliable way.
Agents without dedicated tools struggle with spreadsheets
When an LLM needs to read or modify a spreadsheet, it typically has to generate code on the fly to interact with the file. That code is generated fresh each time and is costly in tokens. As spreadsheet complexity grows, so does generation time and failure rate.
A better way to work with spreadsheets
GRID exposes a structured interface that gives AI systems direct access to read, edit and generate spreadsheets through high-level operations. This means fewer tokens spent generating code, faster responses, and workflows that scale reliably as spreadsheet complexity grows.
Built for Finance AI Products
Investment & Deal Intelligence AI Platforms
For research, diligence, valuation & underwriting
Build agents to research opportunities, run diligence, value assets, and underwrite deals across public and private markets. That work is built on spreadsheet models like a DCF or an LBO, where every number has to be right and defensible.
Spreadsheets are the right place to run these models, and GRID lets you keep them there by giving your agents direct, structured access to read, calculate, and build them. Bring your customers into the agentic era without leaving the spreadsheet behind.
Accounting, Audit & Tax AI tools
For closing, budgeting, auditing and preparing tax
Build AI workflows to close the books, run audit workpapers, drive budgeting cycles, or prepare tax. This work runs in spreadsheets, and it is regulated: a person has to trust the result and see how the agent got there before they sign off.
GRID gives your agents a deterministic spreadsheet engine, so the workpapers and schedules they build foot, tie, and stay traceable for the person who owns the result.
Performance & Reliability
91.25% on SpreadsheetBench
Top performer on the SpreadsheetBench verified-400 benchmark for spreadsheet manipulation accuracy.
~200,000 automated tests
Every engine build runs almost 200,000 automated unit tests to stay compatible with Excel and Google Sheets.
Recalculates at animation speed
Changes propagate through the dependency graph, so only the cells that need to recalculate do. Even large models stay responsive while users push inputs around.
What your product gets
A spreadsheet foundation your users can trust
Runs inside your infrastructure
The GRID engine is a headless TypeScript library that runs inside your application or on a Node.js server. Sensitive financial data never leaves your security boundary.
Numbers that match Excel
Existing spreadsheets run as-is, with the same functions, syntax, error values and edge cases as Excel.
Fewer tokens, faster runs
Agents read cells, recalculate, and edit workbooks through tool calls instead of writing fresh code for every task. Less to generate means faster responses and less tokens used.
Add a spreadsheet surface
Embed our spreadsheet viewer so users can review the agent's work, or our editor so they can make edits, all without leaving your product.
In Production
Working with a leading AI for finance platform we built a custom Excel add-in
When our customer needed to give their AI assistant safe, high-speed access to native Excel, they partnered with GRID to build their own custom Excel add-in.
Instead of letting off-the-shelf Excel assistants manipulate live workbooks directly, their custom assistant runs domain-specific financial skills through the GRID engine. By sandboxing execution, GRID validates logic and catches errors before a single cell changes, ensuring agents never corrupt a critical model.
From initial architecture to production deployment, we worked hand-in-hand with their team to deliver a real differentiating feature of their product.
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 install to production, with direct support from the GRID team throughout.