“What if we only raise half of what we planned?” “What if churn drops by 5 points after we ship the new onboarding flow?” “What if we double the engineering team and bet on faster growth?” These are the questions that shape a startup’s trajectory. But in a spreadsheet, answering any of them means duplicating your entire model, changing the numbers, recalculating runway, and then trying to compare two 14-tab spreadsheets side by side. Most founders either skip the exercise or do it in their head, which is worse. ...

Over the past two years, the three tools that best served startup financial modeling have all been acquired and absorbed into larger companies. Finmark was acquired by BILL and is sunsetting in April 2026. Causal was acquired by Lucanet in October 2024. Pry was acquired by Brex for $90M. Each of these products was built specifically for startups. None of them exist independently anymore. This isn’t a coincidence. It’s a pattern worth understanding, because it left a real gap that affects real founders. ...

You’ve been writing code for six months. You and your co-founder have a product, a handful of early customers, and a pre-seed round behind you. An investor wants to meet next week and you know they’re going to ask about your financial model. You don’t have one. You’re not even sure what goes in one. This is a normal place to be. Most technical founders haven’t built a financial model before. The problem isn’t intelligence. It’s that startup finance has its own vocabulary and conventions, and nobody teaches them to you until someone asks for a spreadsheet you don’t have. ...

A founder I know discovered last year that her runway was off by four months. Not because her assumptions were wrong. Because a SUM range in row 47 didn’t include the last three hires she’d added to the team sheet. The formula referenced B12:B24. Her team list went to B27. She’d been making hiring decisions based on a number that was silently, confidently wrong. No error message. No red cell. Just a clean-looking spreadsheet telling her she had until March when she actually had until November. ...

Three scenes from startup life that shouldn’t still be happening in 2025. Scene one. A first-time founder sits in a WeWork, staring at a downloaded financial model template. It has 14 tabs. One of them is called “Assumptions” but half the actual assumptions live in formulas scattered across other tabs. She changes the headcount in month 6 and the model spits out negative cash for month 4. That’s not possible. She spends two hours finding the broken formula. She has a pitch in three days. ...

Every startup founder has lived this moment: you open a Google Sheet, stare at a blank grid, and try to turn your business into rows and columns. Maybe you download a template. Maybe you copy one from a friend who raised a Series A. Either way, you spend the next two weeks building something fragile, praying nobody asks you to change an assumption. We built Burncast because that process is broken, and it doesn’t have to be. ...