5. Mumbai, India

Mumbai is India’s financial and commercial capital with five of the Fortune Global 500 companies calling it home and many of India’s biggest firms headquartered in the city, including State Bank of India and Tata Group.

While there are no unicorns in Mumbai (private companies with a valuation of more than $1bn) it’s startup success stories include the real estate portal Housing.com, valued at around $250m and Hungama Digital Media Entertainment, one of India’s oldest internet startups.

Mumbai also boasts the most millionaires and billionaires in India.