In April 2021, in the span of just four days, India spawned six unicorns. Compare that number with just eight unicorns in the entirety of the last year. 25 unicorns have emerged in the first eight months of this year. Why is it raining unicorns in India? Can they keep galloping? Cover story author Rajiv Singh explains how the glut of money, less cash burn by startups, and digital push during the pandemic has fuelled their run