What can the Excel assistant do?

It writes formulas from plain-English descriptions, explains formulas you don't understand, and suggests fixes when one errors out. Around that it gives you a real editor, a visual builder, reusable variables, and a snippet library — so it's an everyday workspace, not a one-off helper.

How is this different from Copilot in Excel?

Formula Foundry is focused on formulas specifically and works across both Excel and Google Sheets. Beyond generating formulas it lets you save and reuse them as snippets, manage shared variables, and translate formulas between the two apps — the things that make formula work repeatable, not just faster once.

Yes — there's a free plan with no credit card required, plus a free in-browser playground you can use without installing anything. Paid plans add higher AI limits and team snippet sharing.

Does it install into Excel itself?

Yes. It installs as an add-in from the Microsoft Marketplace and runs in a side panel right next to your spreadsheet. The same workspace is also available for Google Sheets.

Where does my data go?

Your spreadsheet data stays inside Excel or Google Sheets. We only store your account details and any snippets you save, and you can remove them at any time.

Excel Assistant

Your Excel Assistant & Copilotfor everyday formula work.

Write, explain, and debug formulas in plain English — then keep the ones that work as reusable snippets in a proper editor. It's a productivity workspace for the formula bar, not a chat box you copy out of.

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Free, runs in your browser — no signup. Inserting into your real sheet, AI, and sync go live the moment you add it to Excel.

Your spreadsheet experience, reimagined.

Read your formulas in 5 seconds, not 5 minutes.

The native formula bar squishes 200 characters onto one line. Formula Foundry's multi-line editor formats your work like code — syntax highlighting, auto-indentation, and dark mode included. Finally, formulas you can actually read.

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What our users say

Editor's pick

The variable syntax is brilliant. Changing tax rate from 0.08 to 0.10 instantly updated 500+ formulas. Makes spreadsheets maintainable and formulas self-documenting. Perfect for financial modeling.

Namrit Sheth

Data Analyst

Formula Foundry is genuinely impressive. Simplifying complex formulas, adding variables, snippets, and multi-tab editing inside Sheets is such a game-changer. As someone who has to deal with sheets, dashboards and pipelines every day, this feels like a tool built exactly for the pain points data people deal with.

Pavan Kishore Chaparla

Data Analyst

Variables and vlookup are extremely useful in transferring Excel skills and keeping a sheet clean, as well as processing in fewer steps than I otherwise would have known how.

Jason Tau

Senior Financial Planning Analyst

I found the AI Assistant extremely helpful because it saved me time by generating formulas automatically and suggested improvements I might not have thought of. It made complex tasks much easier and more intuitive, especially for repetitive or complicated formulas.

Anand Kumar Gade

Financial & Reporting Analyst

As a marketer, I always end up back in spreadsheets — forecasting, funnel math, quick models, etc. I'm thrilled Formula Foundry created a productivity tool that actually makes a difference with my critical spreadsheet work.

Megan Wells

Vice President Marketing

My favorite feature is the editor and being able to more easily structure my formulas. The easy readability is a game changer! Also, the variables are super useful when I need to put together a complex report.