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About the startup
CalcFi — The Free Financial Calculator Suite CalcFi puts 500+ financial calculators at your fingertips, completely free. Whether you're planning a mortgage, estimating retirement savings, or figuring out compound interest, CalcFi gives you instant answers with zero sign-ups and zero ads. What you can calculate: Loans & Mortgages — Monthly payments, amortization schedules, refinancing comparisons, and affordability estimates Investing & Retirement — Compound interest, 401(k) projections, FIRE planning, dividend reinvestment, and portfolio allocation Taxes & Income — Tax brackets, take-home pay, self-employment tax, capital gains, and withholding estimates Business & Freelance — Profit margins, break-even analysis, cash flow projections, and pricing calculators Crypto & Trading — Position sizing, risk/reward ratios, DCA calculators, and impermanent loss estimators Everyday Money — Tip calculators, split bills, savings goals, debt payoff planners, and budget tools Why people choose CalcFi: Completely free — no paywalls, no premium tiers No account required — just open and calculate Fast and lightweight — results in under a second Mobile-friendly — works perfectly on any device Privacy-first — no data collection, no tracking cookies New calculators added regularly CalcFi was built for anyone who wants clear, accurate financial answers without the clutter. Students, professionals, business owners, and everyday people use it daily to make smarter money decisions.
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Founder stories from Finance & Payments startups
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Cory Zue sells a Django boilerplate, not a $10k MRR meterCory Zue says SaaS Pegasus now makes about 80 percent of his income as a one-time Django starter kit, after Place Card Me taught him to sell PDFs for about $5 and after 2021 product income of about $113,000 across his po |
ProjectionLab hit $10k MRR after years of nights and weekendsKyle Nolan says he built ProjectionLab for his own financial plan, did not expect others to want it, and reached $10,000 MRR after more than two years of solo nights-and-weekends work, with a stepwise chart he published |
Jen Yip stayed a company of one at $45,000 ARRJen Yip says she ran Lunch Money as founder, engineer, designer, and support, and that by May 2020 the budgeting app had 600-plus users and $45,000 ARR. Later she wrote that paying subscribers crossed 1,000 and ARR $80,0 |
Brex changed co-CEOs when the company got too large for shared callsHenrique Dubugras says he and Pedro Franceschi invented an internal-versus-external co-CEO split at Pagar.me, repeated it at Brex, then moved to a Chairman and sole-CEO structure as Brex 3.0 and a possible IPO made joint |
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