An agent for Excel. Not another formula bot.
Deckary plans the work, executes across multiple steps, and verifies its output — building models, auditing workbooks, and cleaning data inside Excel.
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Read. Plan. Execute. Verify.
The agent doesn't guess at a single answer. It loops through real workbook tools — inspecting ranges, writing formulas, formatting cells, and verifying its own output — until the task is actually done.
Read
Inspects active selection, surrounding sheet, and related tabs
Plan
Breaks the task into ordered steps before writing anything
Execute
Writes formulas, formats cells, builds output tabs across sheets
Verify
Reads back its own output, fixes any errors, reports what changed
read_range Sheet1!A1:G42plan scaffold → write formulas → format → verifywrite_formula C3..C26 =B3*(1+$D$2)verify totals reconcile · 0 #REF! · 0 #DIV/0!What “agentic” actually means in Excel
Most AI Excel tools are single-prompt: you ask, they answer once, and stop. Agentic means the AI keeps working until the task is actually done.
Reads first, writes second
The agent reads your active selection, the surrounding sheet, and any related tabs before making a change. It builds context the way an analyst would.
Plans the work as steps
Instead of jumping to a single answer, the agent breaks the request into steps — inspect, scaffold, write formulas, format, verify — and executes each in order.
Verifies its own output
After writing, the agent reads back what it produced. If a formula errored or the math doesn't reconcile, it fixes it and tells you what changed.
Asks before overwriting
Destructive edits pause for confirmation by default. You see what's currently in the conflicting cells before anything is replaced.
Four workflows the agent owns
Built for the analytical work consultants and finance teams ship — not casual spreadsheet questions.
Build a financial model from a prompt
Tell the agent what you need — three-statement, DCF, ROI, sensitivity, unit economics. It scaffolds assumption cells, schedules, and formulas. Everything is linked, so changing a rate updates the whole model.
Audit a workbook someone else built
One of the highest-leverage workflows for boutique consultants and finance reviewers. The agent reads through the model, flags broken formulas, surfaces hardcoded numbers buried in formulas, and reports where the math doesn't reconcile.
Clean a messy data export
Standardize formats, deduplicate, normalize dates and currencies, reconcile two sheets, fix inconsistent headers — the kind of cleanup that usually eats the first hour of any analysis.
Generate an analysis output sheet
Variance analysis, cohort breakdowns, scenario comparisons, KPI summaries — produced as a structured sheet that references your raw data with formulas, not pasted values.
Agentic vs. single-prompt Excel AI
Copilot for Excel, Numerous.ai, and Formula Bot are great at one thing: answering once. Agentic is a different category.
| Feature | Deckary Agent | Copilot for Excel | Numerous.ai (=AI cell) | Formula Bot |
|---|---|---|---|---|
| How it works | ||||
| Multi-step task planning | ||||
| Reads workbook before writing | Limited | |||
| Verifies its own output | ||||
| Edits across multiple sheets | Limited | |||
| Generates entire output tabs | Limited | |||
| Audits existing models | ||||
| Asks before destructive edits | ||||
You stay in control of every change
The agent doesn't silently rewrite your workbook. Read-only inspection never modifies the file. Destructive edits — anything that would replace existing values — pause for confirmation by default.
You see what's currently in the conflicting cells, decide if you want to proceed, and the agent moves on. Trust a workbook? Grant a session-wide allow and let the agent move at full speed.
Overwrite protection on by default
No silent replacements. Every destructive edit is surfaced first.
Verifiable output
The agent reports what it changed and reads back to confirm formulas resolved.
Formulas, not values
Derived numbers are written as formulas with assumption cells — your model stays auditable.
Try the agent on your next model
Install Deckary in 60 seconds. Open any workbook, describe what you need, and watch the agent build it.
Native .xlsx that opens anywhere
Every workbook the agent touches stays a standard Excel file. Send it to a colleague who doesn't have Deckary installed — formulas, formatting, and references all behave the way Excel expects.
Formulas, not pasted values. Outputs reference your raw data — change a source, the model recalculates.
No proprietary lock-in. Standard .xlsx — open in Excel for Mac, Windows, or the web.
Audit trail intact. Trace, evaluate formula, and the formula bar all work as usual.
| B | C | D | E | |
|---|---|---|---|---|
| 12 | Revenue | $12.4M | $15.8M | $20.5M |
| 13 | COGS | $4.3M | $5.2M | $6.8M |
| 14 | Gross profit | $8.1M | $10.6M | $13.7M |
| 15 | Margin % | 65% | 67% | 67% |
What our users are saying
Consultants, corporate strategy & founders all love Deckary.
The AI slide builder turned my bullet points into a polished deck in seconds. Game changer.
James
Senior Consultant
I described our market analysis and got a perfect waterfall chart with insights. Incredible.
Edwin
Strategy Analyst
Mekko charts that used to take 30 minutes now take 30 seconds. Finally works on Mac too.
Carla
Management Consultant
Pasted a CSV and it auto-generated the chart with the right formatting. Pure magic.
Alvin
Principal Consultant
The AI understands consulting slide structure—action titles, bullets, everything.
Ruben
Senior Associate
Built an entire executive summary deck from my notes in under 5 minutes.
Jen
Associate Partner
The AI slide builder turned my bullet points into a polished deck in seconds. Game changer.
James
Senior Consultant
I described our market analysis and got a perfect waterfall chart with insights. Incredible.
Edwin
Strategy Analyst
Mekko charts that used to take 30 minutes now take 30 seconds. Finally works on Mac too.
Carla
Management Consultant
Pasted a CSV and it auto-generated the chart with the right formatting. Pure magic.
Alvin
Principal Consultant
The AI understands consulting slide structure—action titles, bullets, everything.
Ruben
Senior Associate
Built an entire executive summary deck from my notes in under 5 minutes.
Jen
Associate Partner
The AI slide builder turned my bullet points into a polished deck in seconds. Game changer.
James
Senior Consultant
I described our market analysis and got a perfect waterfall chart with insights. Incredible.
Edwin
Strategy Analyst
Mekko charts that used to take 30 minutes now take 30 seconds. Finally works on Mac too.
Carla
Management Consultant
Pasted a CSV and it auto-generated the chart with the right formatting. Pure magic.
Alvin
Principal Consultant
The AI understands consulting slide structure—action titles, bullets, everything.
Ruben
Senior Associate
Built an entire executive summary deck from my notes in under 5 minutes.
Jen
Associate Partner
The AI slide builder turned my bullet points into a polished deck in seconds. Game changer.
James
Senior Consultant
I described our market analysis and got a perfect waterfall chart with insights. Incredible.
Edwin
Strategy Analyst
Mekko charts that used to take 30 minutes now take 30 seconds. Finally works on Mac too.
Carla
Management Consultant
Pasted a CSV and it auto-generated the chart with the right formatting. Pure magic.
Alvin
Principal Consultant
The AI understands consulting slide structure—action titles, bullets, everything.
Ruben
Senior Associate
Built an entire executive summary deck from my notes in under 5 minutes.
Jen
Associate Partner
One workspace for slides and models
The same Deckary subscription that runs the Excel agent ships AI slide editing, brand control, and consulting-grade charts for PowerPoint.
AI Slide Agent
Create and edit slides with AI. Describe your topic, attach data, and get polished slides — automatically using your brand fonts, colors, and layout.
Brand Control
Every slide AI creates follows your brand guidelines. Run consistency checks across your deck and save approved slides to a shared library.
Charts & Timelines
AI generates waterfall, Mekko, Gantt, and bar charts — linked to Excel and styled to your brand.
Icons & Images
2,000+ icons auto-suggested by AI based on your slide content. Country flags and AI-generated images included.
Shortcuts
Align, distribute, swap, and resize — keyboard shortcuts used by top consulting firms.
Hand the agent your hardest workbook
The model nobody wants to inherit. The export that needs cleaning. The output sheet you keep rebuilding from scratch. Try the agent on it free for 7 days.
Frequently Asked Questions
How the AI Excel Agent works