We ultimately decided that BetMGM, Caesars Sportsbook, FanDuel, DraftKings, BetRivers, bet365 and SuperBook are the top sports betting sites on the market. After completing our reviews, we compared them against one another, and then ranked them in order of their overall quality. You can learn more about how we rate online sports betting sites further down the page. Our experts have conducted detailed reviews of every legal online sports betting site and mobile app in the United States. Best Sports Betting Sites in The USA Reviewed