Business
Should I take on a cofounder?
Should I bring a cofounder into my startup, or keep building solo?
A great cofounder doubles your speed, fills your skill gaps and keeps you sane — but cofounder conflict is one of the most cited reasons startups die. The real question is whether this specific person, with clear roles and a vested split, beats going alone.
Pros
- Complementary skills: someone who covers what I am weak at, like sales or engineering8/10
- +Two people ship and sell in parallel instead of context-switching constantly6/10
- −If our skills overlap instead of complement, I am paying equity for redundancy5/10
- Emotional resilience: the startup rollercoaster is far more survivable with a partner who shares it7/10
- Easier fundraising: many investors and accelerators still prefer founding teams5/10
- A built-in sparring partner who can veto my worst ideas before customers see them5/10
Cons
- Cofounder conflict is among the top startup killers, and breakups can wreck the cap table9/10
- −A departed cofounder without vesting keeps dead equity that scares off investors7/10
- +Four-year vesting with a one-year cliff defuses most of the breakup damage6/10
- Giving up roughly half the company — the most expensive equity I will ever spend8/10
- Slower decisions: every major call now needs alignment, and deadlocks are possible5/10
- I have not worked with this person under pressure; friendship is weak evidence of fit6/10
- +A paid trial project of a few weeks reveals working style before any equity moves5/10
- −If it goes wrong with a friend, I may lose the friendship along with the time4/10
Frequently asked questions
- Do startups with cofounders really do better than solo founders?
- The picture is mixed. Accelerators like Y Combinator historically favored teams, and teams do raise funding more easily. But later research analyzing thousands of companies found solo founders were no less likely to build sustainable businesses, and they keep far more equity. The honest takeaway: a great cofounder beats solo, but solo beats a mediocre or untested cofounder.
- How should we split equity?
- Default to equal or near-equal splits with four-year vesting and a one-year cliff, and treat the vesting as non-negotiable. The cliff is what protects you: if your cofounder leaves after eight months, they walk away with nothing instead of a dead 30 percent on your cap table. Unequal splits are fine when contributions clearly differ, but document the reasoning while everyone is still friendly.
- What should we agree on before committing?
- Run the uncomfortable conversations first: roles and final decision rights, salary expectations and runway, hours and other commitments, what happens if one person wants out, and how you each handle stress and disagreement. Many founders do a 4 to 8 week trial project together before signing anything — how someone collaborates under a real deadline tells you more than years of friendship.
Should I bring a cofounder into my startup, or keep building solo?
Weigh it yourself