One of the oldest debates in the startup world is whether you should have a co-founder or go solo to get started. Some investors only like founding teams of two or more. Some investors prefer clean ownership structures where each co-founder owns the same relative amount. Many investors shy away sibling teams or married couples. I prefer to look at each case individually.
As for my experiences, I have done the startup thing both ways and the bottom line is it all depends on the business and of course it depends on you. If you are contemplating making the leap and are ready to build your fort, this issue should be front and center on your mind.
There are three factors that influence my thinking here . . . the rest of the article is here at INC.COM.