"How do Facebook and Twitter, the world’s two most popular social networks, measure up? 10 years on from its founding, Facebook is a force to be reckoned with, boasting 1.3 billion monthly active users and $2.9 billion in revenue.
Twitter hasn't fared too badly either. Though it can’t compete with Facebook’s massive user-base or its mountain of cash, the micro-blogging platform still has an impressive 271 million active users per month with $312 million in revenue."
Take a look this infographic from Forbes and Statista for more Detail.