Revenue : $ 10.5bn Employees : 30,000 + HQ : New York *

Founded 95 years ago in 1926 , McKinsey is an institution in the world of consulting , delivering expertise and insight on industries as varied as oil and gas , fintech , retail , travel and logistics . Proud of its early achievements in globalised thinking , diversity and a signature predisposition to purposeful dissent , it is now one of the world ’ s most influential firms , with around 30,000 consultants spread across the map .

* Though founded by James O . McKinsey in Chicago , the firm ’ s global philosophy means it has no static headquarters ; instead it is the prerogative of the Managing Director to choose their home office .

Revenue : $ 13.1bn Employees : 249,000 + HQ : Bengalaru

Celebrating its 40th anniversary in 2021 , Infosys has rapidly developed into one of the world ’ s leading global consulting and IT services organisations , shepherding businesses through their digital transformation . Claiming to " expertly steer our clients through their digital journey ” and boasting “ unprecedented levels of performance and customer delight ”, Infosys uses an AI-powered system to help govern and assess where businesses should prioritise digitalisation efforts , serving more than 1,500 customers in 46 countries to date . It is the only Indian corporation to hold the United Nations Global Climate Action Award in the Carbon Neutral Now category .

116 April 2021