Valerie R. Wagoner, an American, moved to India a few years back to start ZipDial, a mobile marketing platform that works on missed calls. The company, which was set up about two years back, has customers such as P&G, Unilever, Cadbury, Disney and Mahindra using its service. Companies typically advertise a number where a consumer can leave a missed call. Thereafter, the company uses the mobile number to engage with the consumer. Wagoner expects to clock a million dollars in revenue this year.