Captan – Open-Source Cap Table Management CLI
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) -…
What it does
In the maker’s words, at launch
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 chart Example output: Captan — Cap Table (as of today) Name Outstanding % Alice Founder 5000000 100.00% Totals Issued equity: 5000000 Vested options: 0 Outstanding total: 5000000 Fully 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/captan npm: https://www.npmjs.com/package/captan I’d love feedback on what features would make this more useful to you? Thanks!
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