I built Captan (https://github.com/acossta/captan), a tiny open-source CLI tool for managing startup cap tables.Instead of juggling spreadsheets or paying for expensive SaaS cap table solutions, Captan stores everything in a simple JSON file that you can version-control in Git.It supports:- Stakeholders (founders, employees, investors)- Security classes (Common, Preferred, Option Pool)- Share issuances- Option grants with vesting schedules (monthly, cliff)- SAFEs (record + simulate conversion at a priced round)- Cap table math (Outstanding vs Fully Diluted)- CSV/JSON exports- Audit log ("the ship’s log")Overall a JSON in git will offer better auditability and version control than most commercial solutions out there.Modeling different scenarios is super easy, just create a git branch and model whatever you need.Quick taste:---------------------------------------npm install -g captan$captan init --name "Acme, Inc." --pool-pct 20$captan enlist stakeholder --name "Alice Founder"$captan issue --security sc_common --holder sh_alice --qty 5000000$captan chartExample output:Captan — Cap Table (as of today)Name Outstanding %Alice Founder 5000000 100.00%TotalsIssued equity: 5000000Vested options: 0Outstanding total: 5000000Fully diluted total: 7000000---------------------------------------Why I built it: early-stage founders (myself included) often don’t need Carta or Pulley yet — just a clean, hackable way to track ownership. I wanted something transparent, developer-friendly, and Git-native.Repo: https://github.com/acossta/captannpm: https://www.npmjs.com/package/captanI’d love feedback on what features would make this more useful to you?Thanks!Comments URL: https://news.ycombinator.com/item?id=45078113Points: 2# Comments: 0