There are 10+ reputable online horse betting sites in the USA, including TVG, TwinSpires, Amwager, NyraBets and PlayUP. Unibet sportsbook is available in AZ, IN, NJ, PA, VA In New Jersey, the top-rated site/app for horse racing betting is 4NJBets. The top sites that accept online bets on horse races in the US are betMGM, Unibet, bet365, Caesars, SBK, and DraftKings. What is the new online horse betting app in the USA? Draftkings has launched its DK Horse app in 2023. Register TVG and Twinspires horse racing wagering accounts and get up to $200 in welcome offer. TwinSpires (best bonus $200) – best for 2023ĪmWager and Caesar’s racing websites and apps offer new customers the biggest first deposit bonus ($300) for first bets.More horse wagering platforms are to launch in 20. New horse bet apps are DK Horse, SBK, Draftkings, Pointsbet, Caesars, and PlayUp – all offer hundreds of races to wager on, and new customer promos, including free bets, deposit bonuses, and daily odds boosts. The TVG, DRF Bets, Nyra Bets, AmWager, and DRF Bets are among the best horse racing betting online sites and mobile apps in 2023. Online horse betting is legal and thriving in the USA (in 40+ states).