Fermi by Opt42 | The AI-powered financial modeling and scenario tool for micro-founders, consultants, and creators.

Model it. Stress‑test it. Share it.

Bridge intuition and evidence. Build a quick estimate, compare it with a deep‑dive model, and get AI suggestions that turn plans into testable reality.

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Why People Choose Fermi

Quick Estimate

Turn a gut‑feel into a first pass forecast in minutes—no spreadsheet wrestling, just clean inputs with guardrails.

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Forecast vs Deep‑Dive

Compare your goal‑based forecast with a grounded deep‑dive build to expose gaps, constraints, and levers.

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AI Insights

Get realistic guidance that challenges assumptions, highlights sensitivities, and suggests next best actions.

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Templates & Benchmarks

Pick a SaaS, marketplace, or product template and compare against industry benchmarks to calibrate expectations.

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How Fermi Works

1) Make a Quick Estimate

Enter a handful of assumptions—price, users, costs—and get an immediate forecast with sensible defaults.

2) Deep‑Dive Build

Layer in revenue, COGS, expenses, and initial costs—plus channels, conversion, churn, and timing—to see what it truly takes to hit the goal.

3) Get AI Suggestions

Fermi flags unrealistic inputs, shows sensitivities, and suggests resource allocation tradeoffs.

Start Quick Estimate Start from a Template

Ready to build your first model?

Go from idea to testable forecast in minutes. Start from a template or import assumptions from CSV.

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