Every calculator is free. Upgrade when you need to save, export, or collaborate.
Yes. All 6 calculators work on the free plan with no time limit. You can calculate dilution, runway, SAFE conversions, and more without ever paying. The free plan doesn't save scenarios between sessions — upgrade to Pro for that.
Absolutely. No contracts, no commitments. Cancel with one click from your account page. You'll keep Pro features until the end of your billing period.
Your data never leaves your browser. All calculations run client-side in JavaScript. We don't store your numbers, cap table, or scenarios on our servers. On the free plan, nothing is stored at all. On Pro, saved scenarios are encrypted end-to-end.
Our calculators use the same formulas used by venture capitalists and startup lawyers. SAFE note calculations follow the Y Combinator SAFE framework exactly. We regularly validate our math against known examples and legal precedents.
Yes! If you're part of an accelerator or incubator, contact us for bulk team pricing. We've partnered with several programs to offer FounderMath Pro to their cohorts at a significant discount.
Try Pro risk-free. If FounderMath doesn't help you understand your equity better within 30 days, we'll refund your payment in full. No questions asked.