India ranks fourth highest in the world when it comes to unicorns - privately-owned startups with valuations of over $1bn. But despite being a global startup hub, only a handful reach unicorn status and nearly 90% new ventures fail within the first five years of their inception.

So, what is the secret to building a billion-dollar business? What should your strategy be when picking an idea, trying to secure investment or putting a team together? And what about the long-term viability of businesses once they become unicorns?

Three Indian entrepreneurs tell us stories of their struggles and success, and share tips on how to build a billion-dollar startup.

Presenter: Devina Gupta

(Photo: Young businessman standing in his factory. Credit: Getty Images)