In this article we look at competition in the market and the impact it has on the consumer and businesses. After a brief introduction to the theories behind the opposing views on antitrust regulation, the topic turns to big tech. In particular the platform business models of Amazon, Apple, Google and Facebook are discussed. While their services may be free to consumers, there is a cost paid by businesses for advertising and for selling their products. Are these firms too large? Do they have too much power? What do they really offer? Would consumers and businesses benefit from more rivals in the industry? Or would costs rise and convenience for the consumer diminish? Does government have a role in the market? Does your employer advertise on any of these platforms? Do you sell any products on these platforms?