Many entrepreneurs start businesses in their 20s, but only a tiny fraction of them can say the companies they founded became billion-dollar companies by the time they reached 30 — that's right, a billion.
In some of their first appearances on CNBC, five CEOs from this elite club talk about the products they created that led to their companies' growth and their personal success.
Evan Spiegel: Snapchat co-founder and CEO, 21 years old when it launched
Spiegel presented the idea for what would become Snapchat in a product design class at Stanford, reported Forbes. What his classmates initially thought was a terrible idea has turned in a business valued at $16 billion.