10 super successful co-founders and why their partnerships worked

Not all entrepreneurs need co-founders, but many successful companies - including Apple, eBay, and Twitter - were built by multiple leaders with productive relationships.

How did these individuals find their business counterparts? And what made their combined skill sets a recipe for success?

Not surprisingly, many were long-time friends, classmates, or relatives. Others, however, did not get along initially. Some still are not amicable, despite their joint achievements.

There is a common trend: the most well-rounded pairs recognized their individual limitations and respected what the other could bring to a partnership. Many of these duos have gone on to run some of the most successful businesses of our time.