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Founder
Math.

Move sliders. See your future. The interactive reality check that tells you if your startup will survive, and calls you out when the numbers don't add up.

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Your Numbers

Your Runway

—

months until lights out

—Months to Break-Even
—Customers to Break-Even
—Monthly Burn Rate
Revenue vs Costs
Cash Balance Over Time
Customer Growth (with Churn)

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Go beyond the basics — model multiple revenue streams, plan hiring, break down expenses, and export investor-ready reports.

Multiple Revenue Streams Expense Breakdown Hiring Timeline Sensitivity Analysis P&L Summary PDF Export
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Multiple Revenue Streams PRO

Model different products, plans, and pricing tiers side by side.

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Revenue Streams PRO
Stream 1: Basic Plan
Stream 2: Pro Plan

Expense Breakdown PRO

Break down costs by category to see where your money goes.

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Monthly Expenses PRO
Total: $5,000/mo

Hiring Timeline PRO

Plan when to hire and see the impact on your runway.

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Hiring Plan PRO

Sensitivity Analysis PRO

See best-case and worst-case scenarios side by side.

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Sensitivity Analysis PRO
Shows cash balance under optimistic (+50% growth), base, and pessimistic (-50% growth) scenarios

P&L Summary Table PRO

Month-by-month profit & loss breakdown — investor-ready.

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Profit & Loss Summary PRO

Numbers check out?

If you've found a viable path, we'll help you build it. Coastline takes startups from validated idea to market.

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