There are several reasons why the odds vary at different online sportsbooks. Sometimes the odds compilers at rival sportsbooks have a different opinion on how a game might unfold, so they provide distinctive odds on the outcome. In other cases, one betting site might offer more attractive odds than its rivals in a bid to drum up new business and seize market share from its competitors. The odds on a sporting event also change to reflect the amount of money wagered on either team, and some sportsbooks are slower to react than others, presenting bettors with the opportunity to quickly gain an edge. It also depends on which sportsbooks outsource odds from a supplier like Kambi or curate their own odds in-house. It's usually best to look for a sportsbook with in-house odds and technology like PointsBet for the most flexible options.