Theo Sheets

The spreadsheet that fills itself in.

Excel-grade formulas and a copilot that edits the live grid for you. Build models, clean data, restyle ranges, and enrich lists from the web, just by asking.

Open a sheet See it work the grid

D5fx=SUM(C2:C4)/SUM(B2:B4)Recalculated

RegionPipelineWonWin rate

2AMER$482,900$318,40066%

3EMEA$351,200$210,70060%

4APAC$264,500$171,90065%

5Total$1,098,600$701,00064%

500+ functions✳Real recalculation✳Chat edits the grid✳Find & Enrich✳.xlsx in and out✳Version history✳500+ functions✳Real recalculation✳Chat edits the grid✳Find & Enrich✳.xlsx in and out✳Version history✳

Ask, and it edits

Describe the change. Watch it land.

Theo doesn't hand you a paragraph to paste. It edits the live grid, cell by cell, and shows you exactly which ranges it touched.

“Build a 3-region revenue model with a win-rate column and a total row.”

set_range · A1:D5

Real formulas land in the cells: win rate is =C/B, the total row is =SUM.

RegionPipelineWonWin rate

2AMER$482,900$318,40066%

3EMEA$351,200$210,70060%

4APAC$264,500$171,90065%

5Total$1,098,600$701,00064%

A chat request becoming a live spreadsheet in Theo Sheets

From a sentence to a sheet

A brief in chat becomes a workbook you can open.

Ask for the sheet you need and it arrives structured, formatted, and formula-driven, ready to edit, share, and export to .xlsx.

500+

Functions in the engine

Live cell-edit modes

100%

Formulas recalc on open

1-click

Version restore

#ABCCapabilitiesEFGH

Everything a spreadsheet should be

A real grid, an AI at the wheel.

The formula engine you'd expect, plus a copilot that does the tedious parts for you: cleaning, styling, and researching.

Formulas

Excel-grade formulas

A real calculation engine: 500+ functions, cross-sheet references, and instant recalculation the moment you open a workbook.

Theo editing a spreadsheet from a chat request

Copilot

Chat that edits the grid

Describe the change and the copilot writes cells, formulas, formats, filters, and pivots, with every touched range highlighted.

Enrich

Find & Enrich from the web

Turn a column of names into a researched dataset: sites, details, and contact info written into brand-new columns.

The playbook

Four cells from blank to shipped.

Start or import

Open a blank sheet, ask Theo to build one from a brief, or import an .xlsx with its formulas and formatting intact.

Ask Theo to work the grid

Describe the change (formulas, cleanup, styling, summaries) and watch the edits land with highlighted ranges.

Enrich from the web

Turn a column of names into a researched dataset: Theo finds sites, details, and contacts and writes new columns.

Share and export

Invite your team with live presence, keep version history as a safety net, and export to .xlsx or .csv anytime.

Questions

Everything before your first cell.

Are the formulas real, or just text?

Real. Theo Sheets runs an Excel-grade calculation engine with 500+ functions and cross-sheet references. Everything recalculates the moment you open a workbook.

Can I import my existing .xlsx?

Yes. Import an .xlsx and its formulas, number formats, and cell styling come across intact. You can export back to .xlsx or .csv anytime.

What can the copilot actually change?

It edits the live grid: writes values and formulas, cleans and dedupes data, applies number formats and conditional formatting, sorts, filters, builds pivots, and researches new columns from the web, with every touched range highlighted.

How does Find & Enrich work?

Give it a column of names or companies and describe the columns you want. Theo researches each row from the web and writes the results into new columns. A list in, a dataset out.

Is my work safe to experiment on?

Version history keeps automatic restore points, so any AI edit or manual change is one click away from being undone. Share with live presence when you're ready.

Soft clouds drifting across a bright sky

Stop formatting. Start asking.

A live spreadsheet with a copilot that does the tedious parts. Free to start, on every plan.

Open a sheet Read the docs

Free plan No credit card Import your .xlsx