1win is a crypto-friendly casino and sportsbook operating through a large number of regional mirror domains (1win.com plus dozens of country-specific variants), largely because it is blocked or restricted in several jurisdictions. Sources disagree on its founding year — Wikipedia and one review site cite 2016, while AskGamblers and Casino.Guru both give 2018. No founder is disclosed by the company itself; a Russian investigative outlet (Izvestia, October 2025) named an individual it believes is the real owner, based on its own reporting rather than any company confirmation. Kazakhstan opened a 2023 investigation into 1win alleging unauthenticated payments and possible access by minors, later blocking the platform and reporting a multi-billion-tenge estimate of "criminal income"; it is also blocked in Russia and operates there via mirrors. In November 2024, a hacker published a database exposing roughly 96–100 million user records (confirmed by Have I Been Pwned), including emails, phone numbers, dates of birth and hashed passwords. 1win markets itself partly on a "no KYC" claim that conflicts with independent reviewers' reports of mandatory identity verification at withdrawal.