How to Validate a Co-Founder Before Partnering

5 min read

The cost of the wrong co-founder isn't a bad conversation — it's months of momentum and a chunk of equity that's hard to unwind later. A little real due diligence up front is cheap by comparison.

Watch how they handle a small, unpaid trial before anything is official. Ask for help scoping the first version, or solving one specific real problem. How someone shows up for something small and unpaid is a much better predictor than how they talk in an interview-style conversation.

Ask about their last collaboration, not just their skills. What did they own, what went wrong, and how do they describe the other person's role in it. Someone who can't name anything they'd do differently is a bigger flag than someone who's honest about a past partnership that didn't work.

Check that the vision actually matches, not just the skill set. Two people can be perfectly complementary on paper and still want completely different things from the company — different timelines, different appetite for risk, different definitions of success.

Put the boring parts in writing before you need them. What happens if one person leaves in six months. Who owns what. It feels unnecessary when things are going well, which is exactly why it has to happen before that changes.

Krooko's built-in collab agreement, sent right from a message thread, is meant for exactly this — getting the basic terms down in writing early, without needing a lawyer for the first draft.