Endex is the Best Excel AI Tool for Financial Models

If you’ve ever opened a large Excel workbook and felt that familiar sinking feeling, hundreds of rows, undocumented assumptions, broken formulas, inconsistent formatting, you already know the problem.

Excel isn’t hard.

Understanding someone else’s Excel is.

That’s exactly the problem Endex.ai claims to solve.

Unlike traditional Excel AI tools that explain formulas or generate snippets of content, Endex positions itself differently:

An AI that understands your workbook the way a financial analyst would.

That’s a bold claim, so I put it to the test.

In this article, I’ll walk through four real-world tests using Endex inside Excel:

1. PDF extraction into fully-functional spreadsheets
2. Deep workbook understanding and risk analysis
3. Professional formatting and cleanup
4. Building a complete financial model from scratch

I’ll also explain where Endex fits alongside tools like Copilot, and where it stands apart.

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What Is Endex.ai?

Endex is an Excel add-in that runs inside your workbook as a task pane.

Once installed via Home → Add-ins, it behaves like a persistent AI analyst that can:

• Read and interpret complex Excel models
• Identify errors, risks, and assumptions
• Convert PDFs, images, and PowerPoint slides into dynamic Excel data
• Reformat messy sheets to professional standards
• Build complete financial models from a single prompt

Crucially, it doesn’t just describe what is in your workbook, it analyses what it means.

That distinction matters.

Test 1: PDF Extraction That Actually Creates Excel Models

PDFs are one of Excel’s biggest productivity drains.

Most tools simply dump text into cells, leaving you to:

• Clean layouts
• Rebuild formulas
• Validate totals
• Re-format everything manually

What I Asked Endex

“Extract the data from the PDF invoice and place it in a tabular layout with all relevant information and formulas ready for analysis.”

This is what the PDF invoice looked like before:

This is what Endex created in Excel:

What Endex Delivered

• A clean, structured Excel table
• Formulas, not hardcoded values
• Automatic subtotal and total calculations
• Professional formatting, without being prompted

If I change quantities or unit prices, totals updated correctly. That’s the difference between data extraction and model creation.

Endex can also pull structured data directly from:

• Images
• Scanned documents
• PowerPoint slides

All converted into editable, formula-driven Excel ranges.

Test 2: Workbook Understanding (This Is the Big One)

This is the feature Endex claims truly sets it apart.

For this test, I loaded a large Visa revenue forecast model containing nearly 270 rows of historicals, drivers, and projections, and asked one simple question:

“Explain the key takeaways from this model and highlight any risks or concerns.”

Here’s a glimpse of the model, it’s not for the feint hearted:

And here’s the Endex chat pane with the results:

What Endex Identified Immediately

Revenue Storytelling

• Net revenue growth from ~$23B (2019) to ~$51B (2028)
• A 122% increase over the forecast horizon
• Clear identification of the COVID dip and recovery pattern

This wasn’t a summary, it was interpretation.

Revenue Mix Analysis

• Service revenues growing ~2.5×
• International transaction revenues nearly tripling
• Data processing revenues showing steady CAGR

Each insight included clickable links (shown in green in the task pane) back to the exact rows and sheets driving the conclusion.

Geographic Trends

• International revenue share increasing from 55% → 58%
• U.S. revenue share declining slightly (despite absolute growth)

Again, meaningful patterns you’d expect from a professional model review.

Risk Detection (Where Endex Really Earns Its Keep)

Endex didn’t stop at the positives.

It immediately flagged:

• 20 separate #REF! errors
• 16 #NUM! errors

And because it surfaced the exact cell locations, remediation was immediate.

Beyond technical errors, it raised assumption-level risks and recommended concrete next steps.

That’s not AI summarisation, that’s model review.

Test 3: Professional Formatting in Seconds

Next, I tested something far more common than valuation models, a messy worksheet.

• Inconsistent fonts
• Hardcoded totals
• No visual hierarchy

Exactly the kind of file you’re handed five minutes before a meeting.

Prompt

“Please reformat to an industry professional standard.”

Result

Endex:

• Rebuilt the layout from the top down
• Removed gridlines and improved spacing
• Applied consistent headers and section structure
• Used industry-standard colour conventions
  • Blue = inputs
  • Black = formulas
• Fixed number formats and alignment
• Replaced every hardcoded total with formulas

This is the kind of cleanup that usually takes 10–15 minutes of focused work. Endex did it in seconds.

No gimmicks. Just clean, stakeholder-ready Excel.

Test 4: Building a Financial Model From Scratch

For the final test, I asked Endex to do something genuinely ambitious:

“Build a valuation model for META.”

What It Created

A fully-structured, three-sheet DCF model:

1. Assumptions

1. Income Statement (with projections)

1. DCF Valuation

The model included:

• Historical data imports
• Revenue and margin projections
• EBITDA → EBIT → NOPAT → Free Cash Flow
• Present value, terminal value, enterprise value
• Implied share price

Everything flowed logically. No hardcoded totals. Fully auditable.

Would you still review assumptions? Absolutely. But as a starting point, this was surprisingly comprehensive and built entirely inside Excel.

Endex vs Copilot: Different Jobs, Different Strengths

Tools like Microsoft’s Copilot are designed to work across Microsoft 365.

Endex is purpose built for Excel models.

• Copilot generalises
• Endex specialises

Endex focuses on:

• Understanding complex models
• Analysing assumptions and risks
• Fixing broken logic
• Turning unstructured data into real spreadsheets

Is Endex Worth Using?

If your work involves:

• Large or inherited Excel models
• Financial analysis or forecasting
• Cleaning up messy spreadsheets
• Converting PDFs into usable Excel data
• Building repeatable, auditable models

Then Endex is a productivity multiplier. And importantly, it doesn’t replace Excel skills. It amplifies them.

Try Endex

Endex sponsored the original video, but I don’t do sponsorships lightly. This was the first tool I’ve tested that genuinely does something we can’t already do efficiently in Excel.

Click here to try Endex and apply the code below to get 25% off your first year:

MOTH2026