The biggest sports betting companies in the world include industry giants like Bet365, DraftKings, FanDuel, and William Hill. These companies dominate the market by offering a wide range of betting options, competitive odds, and user-friendly platforms. Bet365 is renowned for its extensive live betting features, while DraftKings and FanDuel lead in the daily fantasy sports sector. William Hill, with its rich history, remains a key player in both online and retail betting. Together, they shape the global sports betting landscape, catering to millions of enthusiasts worldwide.