Of course three-founder and one-founder companies can be successful, it’s just that generally speaking, over mass statistics, if you look at many, many companies, especially the bigger ones, it’s usually two founders that really matter.
Babak Nivi is a co-founder of AngelList and Venture Hacks. Previously, he was an entrepreneur-in-residence at Bessemer Venture Partners and Atlas Venture. He has worked on startups including Songbird, Grockit, and Kovio. He went to school at MIT where received 2 patents and published in Science.