Zerodha founders Nithin and Nikhil Kamath and Flipkart founders Sachin and Binny Bansal are the youngest billionaires in India, as per Forbes. Nikhil, India's youngest billionaire at 37, has a net worth of $3.1 billion, while his 44-year-old brother Nithin's net worth is $4.8 billion. Binny (42) and Sachin (42) have net worths of $1.4 billion and $1.2 billion, respectively.