For investment, credit & valuation teams
Run scenarios, sensitivities and stress tests in seconds, without leaving Excel..
Stop rebuilding data tables and flexing inputs by hand. Point Fontics at your model and get tornado charts, driver analysis and model audits in one click.
No credit card required · Plans from $5/month
The analysis your IC asks for, without the late nights.
Fontics automates the repetitive mechanics of model analysis. Your model stays intact, and you get clear evidence for every judgment call.
Today: building base/bull/bear cases, one toggle at a time
With Fontics: 10+ scenarios in any model in under a minute
Today: building data tables and waiting on recalcs
With Fontics: up to 16 tables without slowing Excel down
Today: flexing inputs one by one to build a tornado
With Fontics: an auto-sorted tornado ranking every driver
Today: running Goal Seek on one variable at a time
With Fontics: solve 3+ variables at once, even on formula cells
20+ modules, four jobs
Everything you do to a model before it goes to committee.
Stress-test the deal
See the downside before your IC does.
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.
When a number goes in front of an investment committee or a lender, "the model guessed" isn't an answer. Fontics runs plain, repeatable math on your own formulas, so every output can be checked, reproduced and defended.
Reproducible
Rerun any analysis and get identical 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 audits with Fontics.
Fontics works alongside Claude and every AI-for-Excel tool, and validates models built with AI in minutes.
| Best for | Claude | Fontics | Examples |
|---|---|---|---|
| Formula buildup | Best suited | Not the primary focus | |
| Data analysis | Best suited | Not the primary focus | |
| Model scaffolding | Best suited | Not the primary focus | |
| 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 | |
| Valuation review | Not the primary focus | Best suited | |
| Model audits | 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 (Windows or Mac) or Google Sheets. One subscription covers both.
Select inputs and an output
Click the cells you want to flex and the result you care about: IRR, MOIC, equity value, DSCR.
Get the chart, table or audit
Results land in new sheets in your workbook, with all output data, ready for the IC memo or credit paper.
Share and re-run anywhere
All modules, in both Excel and Google Sheets. Share the workbook and anyone with Fontics can re-run it.
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
Priced like a utility, not an enterprise contract.
Plans start at a cup of coffee a month. One subscription covers Excel and Google Sheets. Save 17% with annual billing.
Questions finance teams ask first
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. One subscription covers 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.
What happens when my trial ends?
You get 14 days free with no credit card required. After that, pick a plan from $5/month.
Run your first sensitivity before lunch.
14 days free · No credit card required · Excel and Google Sheets