Mr Ambani, 60, comes at the top of the list for his game changing efforts to bring the internet to India's masses. "The oil and gas tycoon entered the country's telecom market with a bang, offering fast internet at dirt-cheap prices. Gained 100 million customers in six months and set off a wave of consolidation in the market," Forbes said, referring to his company's mobile network operator Reliance Jio.
It quoted Mr Ambani as saying that "anything and everything that can go digital is going digital. India cannot afford to be left behind."
Forbes said the 25 trailblazers on the list are reimagining countless facets of everyday life, from health to sending money to relatives abroad.
The list includes founder of home appliances company Dyson, James Dyson, American global investment management corporation BlackRock co-founder Larry Fink, Deputy Crown Prince of Saudi Arabia Mohammed bin Salman, social media company Snap co-founder Evan Spiegel, Chinese ride sharing giant Didi Chuxing founder Cheng Wei and African retail tycoon Christo Wiese among others.
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