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PartnershipsApr 20244 min read

The friend-first trap — and how to avoid it

I chose my first serious business partner the way most people choose co-founders: based on trust and chemistry. We'd known each other for years. The early conversations were electric. We agreed on everything — vision, values, work ethic. Five years later, I discovered I didn't know him at all.

The chemistry trap

There's a seductive logic to working with people you like. The early days feel easy. Decisions happen fast because you're aligned. Conflict is rare because you're both still trying to impress each other. But chemistry is not the same as character, and the conditions that reveal the difference — real pressure, real money, real disagreement — don't tend to show up until long after you've signed the documents. By then, you're committed.

What I missed

The signs were there. In hindsight, they always are. Small things where he deflected rather than answered. Inconsistencies between what he said to me and what he said to others. A pattern of positioning himself as more central to decisions than he actually was. I noticed each of these individually and explained them away. I was practicing motivated reasoning — the version of logic that starts from the answer you want and works backward. I wanted the partnership to work. So I found reasons why everything was fine.

Chemistry means nothing without verified integrity. And you don't verify integrity by feeling good about someone.

What I do now

Before any partnership of significance, I check references the way a good investor checks references — not to confirm what I already believe, but to find out what I don't know. I look for patterns in how someone behaves under pressure, when they're not getting what they want, when something goes wrong and they have a choice between accountability and deflection. I ask hard questions early, when there's still nothing at stake. Because once there's real money and real power involved, the conversation becomes much harder to have honestly.

The takeaway

Trust your instincts, but verify them. The cost of being wrong about a business partner is years of your life and, potentially, the company you built. A few weeks of rigorous due diligence on the person you're about to be professionally married to is the cheapest insurance you'll ever buy.

Jachym Petřík

Written by

Jachym Petřík

Serial entrepreneur & investor

About Jachym

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