The best co-founder is usually someone you've already worked with, or someone you get to know by working on something real together. Matching on paper is a start, not the finish.
Where to look
- Former colleagues and classmates: you already know how they work under pressure.
- Your own network, one step out: ask ten people 'who's the best engineer (or seller) you've worked with?'
- Communities around your problem: industry meetups, online groups, open-source projects.
- Hackathons and startup weekends: a short, intense trial with real deadlines.
- University programmes and incubators, many of which welcome people without a company yet.
- Co-founder platforms like Foundmates, where people say openly that they're looking.
Know what you're looking for
- Which skill does the project need that you don't have (building, selling, operations)?
- How much time can you give, and do you need the same from them?
- Which values are non-negotiable for you (honesty, pace, ambition, how you treat customers)?
- Where should they live, or is remote fine?
How to start the conversation
- 1Be specificSay what you're building, what you've done so far and what kind of person you're looking for. Vague messages get vague replies.
- 2Show progressCustomer interviews, a prototype, a waitlist. People join momentum, not ideas.
- 3Suggest a small first stepA call, then a short project together. Nobody should commit on the first date.
Look for someone who complements you, not a copy of you. Two builders with no seller, or two sellers with no builder, is the most common gap in founding teams.