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.

Get the free runway calculator See the toolkit 2 free tools

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

Setup friction

100%

Local-first & offline

$47,200 runway calculated · 18 months projected · Cohort retention visualized · 3-tier pricing modeled · Investor update compressed · $47,200 runway calculated · 18 months projected · Cohort retention visualized · 3-tier pricing modeled · Investor update compressed ·

The Toolkit

Tools you actually open. Not another tab to maintain.

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01 — Live

Runway Calculator

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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

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MRR Health Snapshot

Quick Ratio, NRR, gross churn — graded A–F against the SaaS benchmark band.

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.