The group owning Betfirst goes by the name of Sagevas S.A and even though it is not well known beyond borders, it is an important player inside Belgium. The website says a great deal about their intentions, as they try to provide the ultimate environment for Belgian punters. It is translated in French, German and English while players are allowed to deposit and wager only in Euros, which can feel a bit restrictive and not for good reasons.
The reason to use Betfirst is ultimately because of the range of sports offered. There are the normal options – football, obviously – and baseball, basketball, ice hockey and American football. But, they also offer bets on other less well-known options – including contact sports like MMA. There has also been the addition of esports recently – which has been widely celebrated by video game fans. The list of esports offered is still relatively short – but this is one of the first sites willing to offer this as an option.