For investment, credit & valuation teams
Hours of Excel analysis, done in minutes. AI-free.
Run scenarios, sensitivities and stress tests in seconds, and review models in minutes.
Results you can defend.
Fast
An analyst's hour of work, done in five minutes with Fontics.
Deterministic
No AI. No black box. Calculations you can trace back to every cell.
Convenient
Before and after, side by side in one native Excel chart.
Portable
Work in Excel or Google Sheets, and share results with anyone.
20+ modules, four workflows
Everything you do to a model before it goes to committee.
Stress-test the deal
Find where the deal breaks before IC asks.
Find what drives value
Know the few inputs that actually matter.
Audit the model
Catch errors proactively, including in models built with AI.
Diligence the financials
Sense-check 10 years of monthly financials in seconds.
Same inputs. Same answer. Every time.
“The model guessed” won't hold up in front of an IC or a lender. Fontics runs plain, repeatable math on your own formulas, so every output traces back to a cell in your model.
Reproducible
Re-run any analysis and get the same results. No prompts, no hallucinations.
Traceable
Every result flows from your model's own formulas, and charts are native and fully editable.
Your model, untouched
Analysis runs in new sheets. Your original model is left intact.
Data stays put
Standard modules run 100% locally. Only Monte Carlo sampling runs in the cloud.
I already use Claude. Why Fontics?
Build with Claude.
Run analysis and reviews with Fontics.
Fontics works alongside Claude and every AI-for-Excel tool, and validates models built with AI in minutes.
| Stage | Best for | Claude | Fontics | Examples |
|---|---|---|---|---|
| Build | Formula buildup | Best suited | Not the primary focus | |
| Data analysis | Best suited | Not the primary focus | ||
| Model scaffolding | Best suited | Not the primary focus | ||
| Analyze | Scenario analysis | Not the primary focus | Best suited | |
| Sensitivity analysis | Not the primary focus | Best suited | ||
| Risk analysis | Not the primary focus | Best suited | ||
| Decision optimizer | Not the primary focus | Best suited | ||
| Review | Valuation review | Not the primary focus | Best suited | |
| Model review | Not the primary focus | Best suited |
Running in your workbook in under two minutes.
Install the add-in
Follow the 30-second install guide for Excel or Google Sheets. One plan covers both.
Select inputs and output
Click the cells to flex (growth, WACC) and the result you care about (IRR, DSCR, valuation).
Get the chart, table or audit
Results land in new sheets with all charts and output data, ready for the IC memo or credit paper.
Re-run as the model changes
Change an assumption and re-run in seconds. Anyone with Fontics can re-run it too.
Trusted by deal and portfolio teams
“The solver identified a circular dependency on a live deal.”
“I can run live stress tests during investment committee meetings.”
“The scenario module will save days every quarter in my portfolio reviews.”
Built for your desk
Start free.
Upgrade as your models grow.
Core is free forever. Every plan works in Excel and Google Sheets, and annual billing gets you two months free.
What analysts ask before installing
Does Fontics change my model?
No. Analysis runs in new sheets and your original model is left intact. Fontics changes the input drivers you select, recalculates the model and records the results, so you can review every output.
Does my workbook data leave my computer?
Standard modules run 100% locally, inside your model. Only Monte Carlo distribution sampling runs in the cloud; every other calculation stays in your workbook.
Will it work on Mac and Google Sheets?
Yes. Fontics installs in about 30 seconds in Excel on Windows and Mac, and in Google Sheets. Every plan works in both.
Can my IT team approve it?
Fontics is a Microsoft Partner and installs through the official Microsoft AppSource and Google Workspace Marketplace listings. For firm-wide deployment, SSO and admin controls, talk to us about the Enterprise plan.
Why is Fontics AI-free?
Generative AI sometimes hallucinates. With zero tolerance for errors in critical financial analysis, 100% of Fontics calculations are deterministic: fully verifiable and reproducible. Fontics works alongside Claude and other AI-for-Excel tools, and helps you validate AI-generated models in minutes.
Run your first sensitivity before lunch.
Free plan · · Excel and Google Sheets