I built Captan (<a href="https:&#x2F;&#x2F;github.com&#x2F;acossta&#x2F;captan" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;acossta&#x2F;captan</a>), 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&#x2F;JSON exports- Audit log (&quot;the ship’s log&quot;)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$captan init --name &quot;Acme, Inc.&quot; --pool-pct 20$captan enlist stakeholder --name &quot;Alice Founder&quot;$captan issue --security sc_common --holder sh_alice --qty 5000000$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: <a href="https:&#x2F;&#x2F;github.com&#x2F;acossta&#x2F;captan" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;acossta&#x2F;captan</a>npm: <a href="https:&#x2F;&#x2F;www.npmjs.com&#x2F;package&#x2F;captan" rel="nofollow">https:&#x2F;&#x2F;www.npmjs.com&#x2F;package&#x2F;captan</a>I’d love feedback on what features would make this more useful to you?Thanks!

Show HN: Captan – Open-Source Cap Table Management CLI