Build and audit Excel workbooks with AI
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
An Excel agent can inspect the workbook, carry out a sequence of edits, and check the result. You provide the task and review the changes and any unresolved findings.
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 a change, the agent can read back formulas and values, inspect errors, and report what changed or still needs review.
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. Ask for linked formulas and check that changing an assumption recalculates the expected outputs.
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 — then inspect the result against the original row counts and totals.
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.
Evaluate the result in your workbook
Compare tools on a real task: the formulas, the changed cells, and whether your output reconciles. Deckary supports these workflows; your review establishes whether the result fits the model.
| Feature | Deckary workflow | What to check in Excel |
|---|---|---|
| Evaluate on your workbook | ||
| Formula audit | Inspect formulas and dependencies | Confirm the flagged cells and source ranges |
| Analysis output | Create a sheet with linked formulas | Change an input and check recalculation |
| Data cleanup | Apply requested changes to a defined range | Compare row counts and preserved inputs |
| Workbook revision | Read, edit, and inspect the result | Review changed cells and unresolved findings |
| Overwrite review | Protect existing target values by default | Inspect the proposed replacement before approval |
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 the Office add-in, open your workbook, and describe the task and checks you need.
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, finance teams, and operators use Deckary to finish PowerPoint and Excel work faster.
Deckary feels like AI built for PowerPoint, not another presentation app I have to export from.
James
Senior Consultant
I can go from Excel analysis to a client-ready chart slide without rebuilding everything by hand.
Edwin
FP&A Manager
Deckary gives me the AI speed I want, with the native PowerPoint output my clients expect.
Carla
Management Consultant
Deckary replaced three separate tools for me: AI slides, charts, and PowerPoint productivity.
Alvin
Corporate Strategy Lead
For recurring board updates, I can clean the model, create the chart, and polish the slide in one workflow.
Ruben
Finance Director
It is the first slide AI tool that also helps with the last mile of deck production.
Jen
Independent Consultant
Deckary feels like AI built for PowerPoint, not another presentation app I have to export from.
James
Senior Consultant
I can go from Excel analysis to a client-ready chart slide without rebuilding everything by hand.
Edwin
FP&A Manager
Deckary gives me the AI speed I want, with the native PowerPoint output my clients expect.
Carla
Management Consultant
Deckary replaced three separate tools for me: AI slides, charts, and PowerPoint productivity.
Alvin
Corporate Strategy Lead
For recurring board updates, I can clean the model, create the chart, and polish the slide in one workflow.
Ruben
Finance Director
It is the first slide AI tool that also helps with the last mile of deck production.
Jen
Independent Consultant
Deckary feels like AI built for PowerPoint, not another presentation app I have to export from.
James
Senior Consultant
I can go from Excel analysis to a client-ready chart slide without rebuilding everything by hand.
Edwin
FP&A Manager
Deckary gives me the AI speed I want, with the native PowerPoint output my clients expect.
Carla
Management Consultant
Deckary replaced three separate tools for me: AI slides, charts, and PowerPoint productivity.
Alvin
Corporate Strategy Lead
For recurring board updates, I can clean the model, create the chart, and polish the slide in one workflow.
Ruben
Finance Director
It is the first slide AI tool that also helps with the last mile of deck production.
Jen
Independent Consultant
Deckary feels like AI built for PowerPoint, not another presentation app I have to export from.
James
Senior Consultant
I can go from Excel analysis to a client-ready chart slide without rebuilding everything by hand.
Edwin
FP&A Manager
Deckary gives me the AI speed I want, with the native PowerPoint output my clients expect.
Carla
Management Consultant
Deckary replaced three separate tools for me: AI slides, charts, and PowerPoint productivity.
Alvin
Corporate Strategy Lead
For recurring board updates, I can clean the model, create the chart, and polish the slide in one workflow.
Ruben
Finance Director
It is the first slide AI tool that also helps with the last mile of deck production.
Jen
Independent Consultant
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.
Deckary for PowerPoint
Create and edit slides with AI. Describe your topic, attach data, and get polished slides — automatically using your brand fonts, colors, and layout.
Deckary for Excel & Word
Build and edit financial models with AI directly inside Excel. Generate formulas, analyze ranges, and audit workbook logic.
Consulting Charts
Create customizable waterfall, bar, and Mekko charts. Add growth arrows, delta indicators, reference lines, and more.
Timelines
Turn project data into editable Gantt charts and timelines. Customize time scales, milestones, colors, and sizing.
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
Try a formula audit, data cleanup, or linked output sheet in your own workbook. 14-day free trial. No credit card required.
Frequently Asked Questions
How the AI Excel Agent works
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