For developers who build things

Your business model
deserves version control

Lean canvas meets financial modeling, designed for founders who think in code. Validate your startup idea before you write a single line.

Create Your Canvas → Free. No signup required.
  model.config
// ModelBox auto-generates this from your canvas
{
  "problem": "Developers ship products without validating the business",
  "solution": "Guided lean canvas with auto unit economics",
  "revenue_model": "subscription",
  "monthly_price": 29,
  "estimated_cac": 45,
  "ltv_ratio": 8.2,
  "break_even": "month 7",
  "assumptions_validated": 3 // of 9 total
}
How it works

Stop guessing. Start validating.

01

Guided Lean Canvas

Not just empty boxes. ModelBox walks you through each section with prompts, examples, and smart defaults based on your industry.

02

Auto Unit Economics

Enter your pricing and market. ModelBox calculates CAC, LTV, break-even, and MRR projections. Your financial model, generated from your canvas.

03

Assumption Tracker

Every business model is a stack of assumptions. Track which ones you've validated, which are risky, and what experiments to run next.

04

Version History

Your business model evolves. ModelBox keeps every iteration, so you can diff your thinking from week 1 to week 12. Like git, but for strategy.

Not another blank canvas

Without ModelBox

Fill out a lean canvas template. Stare at it. Wonder if your numbers make sense. Move on and hope for the best.

With ModelBox

Guided prompts. Auto-generated financials. Tracked assumptions. You know exactly which bets are validated and which are still guesses.

Without ModelBox

Pay $600/yr for Strategyzer. Or use a free template that gives you zero guidance and zero financial insight.

With ModelBox

Developer-friendly pricing. Financial rigor built in. A tool that actually helps you figure out if your idea can make money.

Build the right thing,
then build it right

Most developer tools help you ship faster. ModelBox helps you make sure you're shipping something worth building. Your next startup starts with a validated model, not a guess.

Start Your Canvas →