Five years ago Greg Mercer was traveling the world, making a living by purchasing white-label goods from China and selling them on Amazon. "I realized that some of my products were doing better than others," he said. "I developed spreadsheets to estimate how well all products on Amazon were selling. I thought it would be cool if I could put this into a Chrome extension. I launched it as a fun, side project.” That side project, Jungle Scout, now has roughly 250,000 worldwide customers and 150 employees.