Be one of the first 50 founders to go Pro and lock in 50% off forever. Your price never goes up.
50% off applied at checkout with code FOUNDING50. Cancel anytime.
Save every "what if" calculation. Come back anytime to compare your scenarios.
Download beautiful charts and cap tables for board meetings, pitch decks, and advisors.
Compare two funding scenarios, two vesting schedules, or two equity offers side by side.
Model dilution across 5+ funding rounds. See exactly what happens to your equity at each stage.
If FounderMath Pro doesn't help you understand your equity better within 30 days, we'll refund you in full. No questions asked. You keep the founding price even if you cancel and resubscribe later (while spots remain).
The price goes back to $19/mo for everyone. If you claimed a Founding 50 spot, your price is locked at $9.50/mo forever — it will never increase.
Yes. No contracts, no commitments. Cancel with one click. You'll keep Pro features until the end of your billing period, and your founding price is saved if you resubscribe (while spots remain).
Your calculations never leave your browser. All math runs client-side in JavaScript. We don't store your financial data on any server.
Yes. Every calculator works for free. Pro adds saving, exporting, comparing, and advanced features across all calculators. New calculators are included automatically.