bet365 is a UK-based online gaming operator. Established in 2000, it is one of the biggest online sportsbook names globally. However, in the US market their presence, for now, is limited to New Jersey.
The Caesars Sportsbook can boast its Vegas retail pedigree, and has one of the more extensive online sports betting presences in the US. The parent company bought British bookmaker William Hill in April 2021.
Named after the original bricks-and-mortar casino built in an old Philadelphia sugar refinery, the SugarHouse mobile app began offering online sports betting in New Jersey since late 2018. The operator is from the same Rush Street Gaming stable as Bet Rivers.
WynnBET - the online sportsbook associated with one of the biggest names on the Vegas strip - operates in a number of states and has official betting partnerships with a number of NFL, NBA and NHL teams, as well as Nascar.
FanDuel also began as a fantasy sports competition operator. In 2018 it was acquired by Irish bookmaker Paddy Power Betfair, and within days opened its first retail sports betting outlet at New Jersey's Meadowlands Racetrack.
Practically a household name across the UK, William Hill began as a London-based bookmaker, with retail outlets across the land. Today, however, it operates globally online, and in April 2021 its buyout by US-based Caesars Entertainment was completed.