Facebook is an online social networking service headquartered in California. It was launched in 2004 by Mark Zuckerberg and fellow Harvard students. With over 1.3 billion users and $12.47 billion in revenue, Facebook is very successful. Facebook is considered one of the best tech companies to work for, though early employees dealt with political issues and poor management. It has a flexible, non-hierarchical culture with over 2000 employees working in an open floor plan without cubicles. Mark Zuckerberg leads democratically with a focus on collaboration and creativity. Facebook has a flat organizational structure with fewer management levels to improve communication and reduce costs.