Interactive financial tools for SaaS founders
Stop staring at static spreadsheets.
Single-file, browser-based financial tools built for bootstrapped and pre-seed SaaS founders. Open in a browser tab. Close it next week. Re-open with your data still there.
No signup required · Works offline · Saves locally
Runway Calculator
Current scenario
18 mo
Without 2 hires: 24 mo · Δ −6 mo
Break-even
Mo 11
Net / mo
+$2.4k
47k+
Runway dollars calculated
18 mo
Median projection
$0
Setup friction
100%
Local-first & offline
The Toolkit
Tools you actually open. Not another tab to maintain.
01 — Live
Runway Calculator
Plug in cash, MRR, burn, growth, planned hires. See exactly when you run out — and the cost of each hire on your timeline.
02 — Live
↗MRR Health Snapshot
Quick Ratio, NRR, gross churn — graded A–F against the SaaS benchmark band.
03 — Live
↗Fundability Scorecard
5-pillar radar. Stage band: pre-seed / seed / Series A. The first investor question, pre-emptied.
04 — Live
↗CAC Payback Calculator
Payback months, LTV:CAC ratio, scaleable / risky / unsustainable verdict — the line every paid-channel decision sits on.
05 — Live
↗Cohort Visualizer
Retention decay curves, heatmap, cohort-based LTV — beating flat-churn estimates by 25-40% on real cohort data.
Why this exists
Excel breaks. Notion templates fight your flow. Stripe charts don't tell you what to do next. ChartMogul costs $200/mo before you have $5K MRR.
We ship interactive mini web apps that calculate runway, visualize cohorts, model pricing, and compress investor updates — opened, not maintained. Built for the period between first paying customer and Series A.
When you need answers. Not another dashboard.
Field Notes
A new tool every other week.
Drop your email. We'll send you each interactive tool the day it ships, plus the field notes behind the build. No promotion. No funnels. Just the tool and the thinking.