India has eight billion-dollar startups, led by e-commerce marketplace Flipkart with a valuation of $16 billion, according to analytics platform CB Insights. Flipkart is followed by rival Snapdeal and ride-hailing app Ola, with valuations of $7 billion and $5 billion respectively. Digital wallet Paytm ranks fourth among the country's billion-dollar startups with a valuation of $4.83 billion.