Big 4 companies: What are the differences

What are the differences between the Big 4 Accounting Firms: KPMG, PwC, EY, and Deloitte? Find out what makes the Big 4 different in our Consultancy Blog. The Big 4 professional services firms—Deloitte, PwC, EY, and KPMG—are household names in consulting, tax, and auditing. In India, these firms are booming, reporting higher revenue growth than their global offices. The Big Four are the four largest professional services networks in the world: Deloitte, EY, KPMG, and PwC. They are the four largest global accounting networks as measured by revenue. [1] .