Find a co-founder, split equity
Find the right partner and split equity without regret.
3 steps to get you moving, each with a resource worth your time and more waiting underneath
Think of this as a friendly starting line, not the last word. Each step gives you the gist, then a resource worth your time from founders who've been there. There's always more underneath, more questions and more resources, whenever you feel like digging in.
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1
Finding a co-founder
Pick a partner as carefully as a spouse.
Do I actually need a co-founder, or can I go solo?The gist You don't strictly need one, but the data says teams outlast solos: complementary skills, shared load, and someone to argue you out of bad calls all matter. If you go solo, do it because you couldn't find someone great, not because you're avoiding the hard conversation. Never take on a co-founder just to fill a seat, a mediocre partner is far worse than none.
Y Combinator Co-Founder Matching ycombinator.com The largest and most credible free co-founder matching platform in the world, with vetted founders and 100,000+ matches made. It's the default starting point when your own network doesn't have the right person. -
2
Co-founder agreements & equity
Split fairly, vest always, write it down.
How should co-founders split equity fairly?The gist For most early teams, split close to equal, an even split signals you see each other as true partners, and long-term contribution rarely matches whatever you'd predict on day one. Obsessing over 55/45 vs 50/50 usually costs more in resentment than it saves in ownership. What actually protects you isn't the exact number, it's vesting and a written agreement.
The Founder's Dilemmas Princeton University Press The definitive, data-driven book on early founding-team decisions, drawing on quantitative research covering nearly 10,000 founders. It replaces gut-feel folklore about co-founders and equity with evidence. -
3
Founder-market fit
Why you, and why this problem?
What is founder-market fit and how do I know if I have it?The gist Founder-market fit is the unfair match between who you are and the problem you're solving: your background, network, obsession, and specific knowledge give you an edge in this exact market. You have it when you can say why you, and no one else, are uniquely built to win here. If your only answer is 'the market is big,' you don't have it yet.
The 4 Signs of Founder-Market Fit NFX Currier's whole argument is that founder-market fit is more than the one line on a resume that says 'domain expert'. He breaks it into experience, obsession, founder story, and personality, which is exactly why a pair can hold the fit between them: your co-founder may carry the domain, while you may carry the obsession, the story, or the personality the market trusts. Read it as a starting point for asking which pieces of fit each of you actually holds, not for deciding who is 'the fit'.
