The biggest betting company in the world is often considered to be Flutter Entertainment, which owns popular brands like Betfair, Paddy Power, and FanDuel. With a global presence and a diverse range of betting options, including sports, casino games, and poker, Flutter has revolutionized the gambling industry. The company's innovative approach to online betting and its strategic acquisitions have solidified its position as a market leader, catering to millions of customers worldwide while navigating the complexities of regulatory environments in various countries.