https://qz.com/1249296/is-facebook-a-monopoly-facebook-ceo-zuckerberg-didnt-have-an-answer-in-congressional/ >Mark Zuckerberg battled his way through congressional testimony on April 10 as one US senator tried to pin down the Facebook CEO on a single question: Is Facebook a monopoly? >Republican senator Lindsey Graham of South Carolina asked Zuckerberg to name his biggest competitor. Zuckerberg responded by outlining three “categories” of companies, starting with one category that included big tech companies like “Google, Apple, Amazon, and Microsoft.”