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#27 · Founder Files

The Co-founder Breakup Files

30 Documented YC Co-founder Splits.

Equity clawbacks, vesting negotiations, team reactions — and whether the company survived. The document you read before choosing a co-founder.

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What's inside

  • · Structured rows — searchable, filterable, exportable
  • · Source link on every entry — verifiable in one click
  • · Founder, batch, category and outcome tagging
  • · Updated as new public information emerges
  • · Web-readable + PDF download
  • · Free for current subscribers; no email required

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FAQ

What is the The Co-founder Breakup Files?
Equity clawbacks, vesting negotiations, team reactions — and whether the company survived. The document you read before choosing a co-founder. It's part of the YC Insights database — the largest open library of Y Combinator learnings, built entirely from publicly available essays, batch pages, founder interviews and S-1 filings.
Who is the The Co-founder Breakup Files for?
Founders, operators and investors who want a structured view of the founder files side of the YC ecosystem. Whether you're applying to YC, picking an idea, or studying what's worked, this database compresses hundreds of hours of public research into one place.
Where does the data come from?
Everything is sourced from publicly available material: YC's own website, batch pages, founder interviews, partner talks, S-1 filings, and long-form podcasts. Every claim is linkable to a public source — no insider data, no leaks.
When does the The Co-founder Breakup Files launch?
It's shipping soon at Free. Add your email below and we'll send it the day it drops, plus a launch-day discount for early subscribers.
Is YC Insights affiliated with Y Combinator?
No. YC Insights is an independent research project. We are not affiliated with, endorsed by, or sponsored by Y Combinator. Everything we publish is built from publicly available Y Combinator material with sources linked.
What else is in the YC Insights database?
43 databases in total across founder origins, pivots, first-1000-customer stories, batch packs, vertical packs (AI, fintech, SaaS, consumer, healthtech, edtech), deep reports and master playbooks. Browse them all at /database.

More in Founder Files

The Burnout Files

40 Founder Mental Health Stories.

The Almost Quit Files

35 YC Founders On Their Lowest Moment.

The Founder Marriage Files

25 YC Founders On Relationships Under Pressure.

YC Insights is an independent resource. Not affiliated with or endorsed by Y Combinator. Built from publicly available material.