No public record we found puts them under one owner. They are separate brands, and each has its own accounts, bonuses and terms. 1xBet was founded in 2007 and is reported to be based in Limassol, Cyprus. It claims a Curaçao licence, and our review lists 1X Corp N.V. as its operator. 1win launched in 2016. Its own terms do not name the company that runs it. Licence listings from other sites cite 1win N.V. in Curaçao, and we have not seen that number on a 1win page.
The names differ by one letter, both sites lead with sports betting, both take crypto and both rely on Curaçao licensing. Plenty of unrelated offshore sportsbooks share that model, so it does not show common ownership.
Nothing carries over between them. A 1xBet account does not log in at 1win. The 1xBet code CRYPTOPOKERDB does nothing at 1win, and 1win's free-spin package does not apply at 1xBet. A 1win account starts from zero. Self-exclusion works the same way, so set it on each site you use.
1xBet has an exclusive Crypto Poker DB offer: a 130% welcome bonus up to $130 with promo code cryptopokerdb (100% up to $100 without it). The code is entered at sign-up.
1win lists up to 400 free spins across the first 4 deposits. The package is market-dependent and no code is needed.
Both sites refuse players in the United States, the United Kingdom, Australia, France and Spain. 1win's terms also list Malaysia and Germany, and they ban VPNs outright: an account caught using one can be closed and its winnings forfeited. Check the full list in each site's terms before you deposit; 1win says it can change its list without notice.