Build & edit Excel workbooks with AI.
Deckary's agentic AI Excel add-in builds models, audits workbooks, cleans data, and rewrites sheets — directly inside Excel.
7-day free trial • No credit card required
Our users work at companies like
Deckary helps consulting & industry firms to build better presentations
From a prompt to a live financial model
Describe the model — three-statement, DCF, ROI, sensitivity, unit economics. The agent scaffolds assumption cells, schedules, and formulas. Change one rate and the rest of the workbook recalculates.
- Assumption cells separated from formulas
- Linked schedules — change inputs, outputs follow
- Number formatting matched to your sheet
- No hardcoded values buried in formulas
Describe your model
"Build a 4-year revenue model with 27%, 30%, 30% growth and 67% gross margin."
| B | C | D | E | F | |
|---|---|---|---|---|---|
| 14 | — | — | — | — | — |
| 15 | — | — | — | — | — |
| 22 | — | — | — | — | — |
| 36 | — | — | — | — | — |
Audit a model someone else built
Point the agent at a workbook. It walks every sheet, flags broken formulas, surfaces hardcoded numbers buried inside formulas, and reports where totals don't reconcile — before you stake a recommendation on it.
Walks dependency chains across sheets
Surfaces numbers hidden inside formulas
Reports where math doesn't add up
Calls out missing assumptions
Messy data in. Decision-ready sheet out.
Drop in a raw export. The agent normalizes dates and currencies, deduplicates, reconciles sheets, and produces a structured output tab — with formulas referencing your raw data, not pasted values.
Cleanup that holds. Standard formats applied across thousands of rows in a single pass.
Outputs you can hand off. Variance, cohort, scenario, KPI summaries — produced as structured sheets, fully linked.
Formulas, not values. Change a source cell and the output sheet recalculates — your model stays auditable.
| Date | Customer | Amount | Country |
|---|---|---|---|
| jan 3, 2024 | Acme INC. | $1,240.00 | usa |
| 1/5/24 | acme inc | 1240 | USA |
| 2024-01-08 | Acme Inc | $2.4k | United States |
| jan 9 24 | ACME, Inc. | USD 980 | us |
| 1-12-2024 | Acme Inc | $1,540.50 | U.S. |
The work an Excel agent should actually do
Most AI Excel tools generate one formula at a time. Deckary works the way a consultant or analyst works — across multiple steps, sheets, and edits.
Build models from a prompt
Three-statement, DCF, sensitivity, ROI, unit economics — scaffolded with assumption cells and linked formulas, not hardcoded numbers.
Audit any workbook
Point the agent at a model someone else built. It flags broken formulas, hardcoded values, and sheets where the math doesn't reconcile.
Clean messy data
Standardize exports, reconcile sheets, fix inconsistent formatting, deduplicate, normalize dates and currencies — without writing macros.
Generate output sheets
Cohort analysis, variance, scenario comparisons, KPI summaries — produced as a structured sheet that references your raw data with formulas.
Overwrite protection
The agent asks before replacing existing values. You stay in control of every destructive change.
Native Excel
No exports. No separate app. No rigid templates. The agent edits the workbook you already have open.
Your workbook never leaves Excel
Tools like Rows, Equals, and Quadratic want you to migrate to a new spreadsheet. Deckary doesn't. The agent runs in a side panel and edits the .xlsx file you already have open — same Excel, same formulas, same compatibility.
| Feature | Deckary | Copilot for Excel | Numerous.ai | Rows |
|---|---|---|---|---|
| Capability | ||||
| Works inside Excel | Separate app | |||
| Agentic, multi-step task execution | Limited | |||
| Builds full models from a prompt | Limited | Limited | ||
| Audits existing workbooks for errors | ||||
| Generates output sheets with linked formulas | Limited | Limited | ||
| Cleans and restructures messy data | Limited | Limited | ||
| Overwrite protection on destructive edits | ||||
| Built for consulting & finance work | ||||
No new tool to learn. No exporting. No reformatting. Just AI inside the workbook.
Why an agent beats building models manually
An analyst spends hours scaffolding before any real analysis happens. The agent collapses that to minutes — and your judgment stays where it belongs.
Building Models Manually
~3 hours per model
- Hours scaffolding assumption cells, schedules, and formula plumbing
- Manually auditing where formulas broke or numbers got hardcoded
- Reconciling messy data exports by hand
- Inconsistent number formats and styles across sheets
- Building output tabs from scratch every time
- Switching between Excel and ChatGPT to get formula help
Deckary AI Excel Agent
~5 minutes per model
- Describe the model — agent scaffolds the workbook
- Agent audits existing workbooks and surfaces broken logic
- Cleans and restructures data exports automatically
- Matches existing fonts, colors, and number formats
- Generates output sheets linked to your raw data with formulas
- Inside Excel — no copy-pasting from a chat window
Let the agent handle the plumbing. You focus on the analysis.
Start for FreeBuilt for the work consultants and finance teams ship
Boutique consulting, corporate strategy, FP&A, PMO. The agent is tuned for structured analytical work — not casual spreadsheet chatter.
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
Already using Deckary for PowerPoint?
The same workspace handles your slides — AI editing, brand control, charts, icons, and shortcuts.
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.
Ready to put an agent on your next workbook?
Install Deckary in 60 seconds. Open any .xlsx, describe the task, and watch the agent build, audit, or clean it — directly inside Excel.
Frequently Asked Questions
Everything you need to know about the AI Excel Agent