At just 19, Aadit Palicha and Kaivalya Vohra own Zepto, the start-up which is now worth between $200 million and $300 million after receiving $60 million in an initial funding round. In an exclusive interview to NDTV, they share the idea behind their grocery app and how they plan on taking on their competitors in the market such as Swiggy, Grofers and Amazon Fresh.