Can co-founder relationship problems be worked through with effort, or should early warning signs about a partner be treated as disqualifying?

Paul Graham · published Oct 2006

Most founder disputes stem from the people rather than the situation and could have been avoided by choosing cofounders more carefully and not suppressing misgivings.

Most founders burned by disputes probably had misgivings they suppressed at the start; it's much easier to fix problems before the company is started.

source The 18 Mistakes That Kill Startups

Paul Graham · published Oct 2010

Founders must genuinely like one another and work well together, because startups will destroy any relationship that can be pulled apart.

Startups do to the founders' relationship what a dog does to a sock: if it can be pulled apart, it will be.

source What We Look for in Founders

Kathryn Minshew · published Sep 2, 2016

Believing you can prevent a founder breakup through sheer effort, despite warning signs about your partners, is a classic inexperienced mistake

She ignored people who told her not to work with that group because she loved the idea and couldn't imagine a breakup — and the breakup happened anyway

7:56 20VC: How To Win The Strategic Process Of Fundraising and Optimising Co-Founder Relationships and Break Ups with Kathryn Minshew, Founder & CEO @ The Muse

Chad Peets · published Jan 9, 2026

You should determine philosophical alignment with people you work with very quickly and part ways fast if it isn't there

Working with people who aren't philosophically aligned drives him insane and produces endless conflict, and ultimately people don't change

Scope: speaking about his own later-career posture

43:21 20Sales: Why the Best Sales People are F**** in the Head | Why Remote Work is BS | Why Europe is a Nightmare for Recruiting Sales Teams | How to Build a Sales Machine | What Everyone Gets Wrong Today in Sales with Chad Peets

Sebastian Siemiatkowski · published Mar 1, 2021

A deteriorated co-founder relationship damages a company not through who is right on any given decision, but through the ambiguity it creates, which some people exploit to avoid accountability or play the founders against each other

Two ways of doing something can be equally successful, so the disagreement itself is irrelevant; the organizational cost comes from the lack of clarity people can exploit

15:38 The damage is organizational ambiguity not the disagreement