A team of 2 or 3 with complementary skills and a written 5-line contract.
Choosing who you build with is the biggest decision a founder makes, so we treat it like a craft, not luck. You will post your skills, speed-date the room with your thesis, and form a team around the strongest problems. Not just your friends: the people who sharpen your thinking.
Most startups die from co-founder conflict before they die from competition. A team picked deliberately, with a written contract, survives the mid-week dip that kills casual teams.