I think you're onto something there. Maybe your thoughts could be generalized like this: Equity split should reflect the relationship of the co-founders. (EDIT:

I think you're onto something there. Maybe your thoughts could be generalized like this: Equity split should reflect the relationship of the co-founders. (EDIT: I just saw you already wrote almost the same) Friendship based on fairness typically consists of mutual respect and confidence in each others capabilities and shortcomings. Such friends have most certainly learned to appreciate their diversity and face another on an equal footing. In this case, a uniform split would be a natural fit - anything else would question the fairness of the relationship. The problem I see is that even in long-time friendships it is not always clear what type of relationship it is. I would claim that in every relationship, all aspects (fairness, personal benefit and more) are present to some amount. And as you say yourself, each member could understand the character of their friendship differently. The implication is: Before deciding how to split, find out in what kind of relationship you are. A russian proverb comes to mind: If you want to get to know someone, go on a mountain hike with him. My russian-speaking friend told me that one, and in fact, we went to the mountains together. Almost died several times. We know each other very well now :)