Vijay Shekhar Sharma founded Paytm now dominates online transactions with it having half of the share of the market among rival gateways. Driving its growth are leading brands which include Reliance Jio, Uber, Zomato, OYO, Dominoes and IRCTC, and others, as the majority of the digital transactions are done for these brands, Paytm said in a statement. Also, Paytm Payments Gateway (PG) has seen a three-fold jump in the number of transactions in the last year.