Free · No login · No backend
Startup runway calculator that
actually understands SaaS.
Your SaaS metrics, expenses, and payroll—one chart,
one runway number. No spreadsheet, no
$2k/month enterprise tool.
Your SaaS metrics, expenses, and payroll—one chart,
one runway number. No spreadsheet, no
$2k/month enterprise tool.
When churn creeps up or acquisition slows down, MRR doesn't move in a straight line. The hit — or the bump, when things go well — is steepest in the first few months, then gradually flattens as the compounding plays out. Most founders don't see the shape of it until they've already hit the iceberg.
The problem is, your brain sees the first two months and draws a straight line. But the curve flattens. So you end up cutting too deep or spending too fast — reacting to a future that was never going to happen.
To model this properly, you've had two options:
Airstrip Enter your numbers. See your runway.
Everything you'd need Baremetrics + QuickBooks + Gusto +
a spreadsheet to calculate runway—in one chart.
Start with the inputs you actually have: ARPU, churn rate, new customers per month. Airstrip models the lag between metric changes and runway impact—the thing spreadsheets get wrong.
Add employees with salaries, start and end dates. Hide roles to see what cuts do to runway. Play scenarios without touching your real books.
Recurring costs, one-time expenses, Stripe fees, owner's draw, estimated tax payments. Everything accounted for.
MRR, annual plans, one-off capital injections, secondary recurring revenue. Model your business as it actually works, not how tools assume it does.
Every variable encodes into the URL. Send your co-founder the optimistic scenario. Send your advisor the realistic one. No attachments, no "which version is this?"
No backend. No login. No data harvesting. Your financial projections stay in your browser. We literally cannot see them.
I built Airstrip to calculate runway at Huntr, my B2C SaaS company. After 8 years of maintaining a spreadsheet that pulled from Baremetrics, QuickBooks, and Gusto; I finally made the leap and built the tool I actually needed.
– Rennie Haylock, founder of Huntr
See where your runway is actually headed. No signup, no credit card, no "let's schedule a demo."
Open Airstrip