Ideally, it’s someone you’ve worked with before — someone you deeply admire. The key is alignment:
Mutual respect matters just as much as trust. Respect is about recognizing and valuing each other’s strengths. A co-founder isn’t just a friend — they should bring complementary skills you need. You should be able to “mind meld” on big decisions, but also disagree, argue, and repair.
Picking a co-founder “cold” can work, but we don’t recommend it, as it comes with obvious risks.
Instead, start with your networks. Lean on super-connectors — investors, mentors, colleagues who know lots of people. If you find someone promising, don’t just swap résumés or have coffee. Work on something together.
The best filter is tackling a hard project side-by-side and seeing if you make each other better. Give it a few months as a trial period, and check in regularly about whether you both want to keep going.
Startups are lonely, so you want to have the right partner in the trenches. But don’t just “pick and go.” Sit down early and often with your co-founder to align on:
Honest conversations can save you years of pain. And don’t consider it a one-time thing — keep revisiting these core tenets as the company evolves.
Not every great company starts with two names on the masthead. If you don’t have the perfect co-founder yet, you have a few options:
There’s no single right answer. What matters is bedrock conviction in yourself and your founding team.
Do you have something unique? Deep domain knowledge, a special skill, or the ability to recruit and inspire top talent? Investors will hold you to the same standard as co-founded teams. But if you’re sure, better to be solo and strong than partnered and misaligned.