World's Second Youngest Self-Made Billionaire: Ritesh Agarwal, a college dropout, is the richest self-made Indian under 40. Nithin and Nikhil Kamath, the co-founders of Zerodha, are two of India's newest self-made billionaires and are both in their 30s. Byjus' Raveendran family (11,523 Crore) and the Bansals, who co-founded Flipkart (8,231 Crore), come in second and third, respectively.