I'm specifically wondering about people who played a pivotal role in their success, especially early on.
- Peter Thiel was crucial for Mark Zuckerberg (Facebook)
- Ray Chambers for Jack Dorsey (Twitter)
- Ken Allard and investors Ben Horowitz for Dennis Crowley (Foursquare)
- Paul Graham and Partovi Brothersfor Drew Houston and Arash Ferdowsi (Dropbox founders)
- Adam D'Angelo for Kevin Systrom (Instagram)
See more of who mentored whom at