It’s the story that motivates hardworking people to ditch their career and chase the entrepreneurship dream: the tech startup that turns its founder into a very, very rich person.

On Forbes' latest list of the richest people in the world, 167 of the top 500 billionaires were in the U.S. Of those 167, 15 of them made their big bucks in tech startups.

Related: The Habits of Self-Made Billionaires (Infographic)

From Amazon’s Jeff Bezos to Oracle’s Larry Ellison, check out which tech titans made the list in this infographic compiled by a Houston-based online guide to business management programs.

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A Dollar and a Dream: 15 Tech Startup Billionaires (Infographic)