Paytm

India's youngest billionaire broke all the rules when he built Paytm, now India's second most valuable internet startup worth some $10 billion. Coming from a lower middle-class family, Vijay Shekhar Sharma's rise to prominence is a classic rags-to-riches story. What's not so classic is what he plans to achieve. In short, Sharma not only plans to keep the company growing, he also wants to cut corruption through recorded digital transactions, bring the power of credit to a quarter of India's billion-plus population still living below the poverty line, draw more of them into the country's tax net, and in the process, build up technology infrastructure for all.