CapTable: ownership and fully diluted without the fragile equity spreadsheet

CapTable is a free, local-first capitalization table for founders and startup counsel.

Founders, seed preferred, and an option pool that never quite reconciles to authorized shares. The cap table still often lives in a multi-tab workbook where one wrong formula changes everyone’s ownership overnight.

Live app: https://sybilgambleyyu.github.io/CapTable/

Source: github.com/SybilGambleyyu/CapTable

What you get

• Share classes: common, preferred, option pool with authorized shares
• Holders and issuance lots (date, price, certificate)
• % outstanding and % fully diluted (pool reserve included)
• Ownership and lots CSV — data stays in the browser

Honest limits

Not a transfer agent, SAFE converter, or 409A tool. No liquidation preference waterfall. Not legal or securities advice.

MIT licensed.