1xBet is an online gambling company licensed by Curaçao eGaming License. The company was founded in 2007 and is headquartered in Cyprus. 1xBet is one of the world's largest online casinos and according to Sports Illustrated "probably the biggest sportsbook on the planet". The company sponsors major professional football teams such as Spain's FC Barcelona, Ecuador's Barcelona S.C., France's Paris Saint-Germain and major Esports teams such as OG Esports, Team Spirit, Made in Brazil and Tundra Esports.

The organization operates a franchise business model. Following investigations into the company's finances, it is not allowed to operate in a variety of countries including the US, UK, Russia, France and Spain which led the company to change its focus to Africa, South America, South East Asia and India. The company partnered with celebrities such as Maître Gims in Congo and Dave Leduc in Myanmar.

International arrest warrants have been issued for the company's three founders, one of whom reportedly died in Switzerland in 2023. The website accepts bets on a variety of sporting events such as football, basketball, cricket, tennis, and esports, as well as make predictions on political, economic, and cultural events or even the weather. The platform has raised controversies for accepting bets on amateur matches involving minors and cockfighting. In 2025, 1xBet became the official betting partner of the Billie Jean King Cup.