Cap Table Modeler

Model founders, SAFEs, rounds, and grants, and see what everyone actually walks away with at exit.

The tool runs entirely in your browser. Nothing is saved to a server, nothing is sent to us. No backend, no signup. Download the kit to host your own private copy for free.

A cap table in a spreadsheet hides the number that matters.

The Problem

If you've ever modeled equity, you know the pain:

A SAFE or a new round quietly eats points of ownership you can't easily see.
"What do I actually walk away with?" turns into a tangle of circular formulas.
Explaining dilution to an employee means screenshots and hand-waving.

There's a clearer way. So we built one.

A real cap-table tool, not a spreadsheet.

What's Inside

Founders, an option pool, and priced rounds: with the investor pool top-up handled for you.
SAFEs & convertible notes: a live preview of exactly what they convert into.
Option grants: strike price and vesting (cliff + schedule).
Exit / cash-out waterfall: value the company, model a full sale or a minority recap, split primary vs. secondary, and see cash at closing, retained value, and a before/after cap table.
Liquidation preferences: multiples, participation, seniority, and hurdles.
A built-in guided tour walks anyone through every module, plus a clean PDF export.

It's yours. It's free.

How to use it

Getting Started

Try it here

Live tool

Click Open the Live Tool to explore with a full sample company. No signup. It runs entirely in your browser; nothing is saved to a server. Take the guided tour when it offers, and export a PDF anytime.

Make it yours

Download & host

Hit Download the Kit for the full tool plus a plain-English guide. There's no backend to set up: open it on your computer, or drag the app/ folder onto a free host like Netlify. Done in minutes.

What you'll need to self-host

Nothing but a browser, to start. Unzip the kit and open app/index.html. It just works, and saves your scenario in that browser.
A free static host, to reach it anywhere. Drag the app/ folder onto Netlify (or Vercel, Cloudflare Pages, GitHub Pages). Free tier, no per-site charge.
No database required. The tool needs no server. You'd only add your own Supabase if you want saved cap tables to sync across devices, and that's entirely optional.
~5 minutes. You don't need to be a developer. The included guide walks you through it.

Just want to look first? The live tool above shows everything (rounds, SAFEs, grants, the exit waterfall, and PDF export) with no setup at all.

Take it with you

Downloads

Everything is free: the tool, the guide, and a one-page overview.

Self-host kit

The tool + guide

A zip with the full app, a plain-English how-to-host guide, and the one-pager. Host your own private copy.

Download .zip

PDF

How-to-host guide

The no-backend hosting walkthrough on its own. For non-developers.

Open guide PDF

PDF

One-pager

A single-page overview of what the tool does. A handy leave-behind.

Open one-pager PDF

Ready to start?

Open the live tool, or download the kit and host your own copy. No signup, no cost, no backend.

Open the Live Tool Download the Kit

A modeling tool, not legal, tax, or accounting advice, and not a system of record. Option values are for modeling only; real grants need a 409A valuation. See our Disclosures.