Who was responsible for hacking Ashley Madison?

The exact individuals responsible for the hacking of the Ashley Madison website in July 2015 have never been publicly identified. The hack was executed by a group or an individual that called themselves "The Impact Team." This entity claimed responsibility for the breach, which resulted in the leak of personal information belonging to millions of users of the adultery-focused dating site. The Impact Team justified their actions by accusing Ashley Madison's parent company, Avid Life Media, of deceptive practices, particularly over the site's service that claimed to delete user data for a fee without actually doing so. Despite extensive investigations, the identities behind The Impact Team remained anonymous, making it one of the notable unsolved cybercrimes related to personal data breaches.