21 Sextreme

21 Sextreme is one of the specialist adult properties developed within the 21Sextury network. Its exact-match 21Sextreme.com web identity dates to 2010, giving the brand a distinct chronology separate from the main 21Sextury site, which began several years earlier.

Public studio indexes continue to identify 21 Sextreme alongside 21 Naturals and 21Sextury, and current domain records show the property remains active. The site is therefore treated as a specific studio brand inside the 21Sextury ecosystem rather than as an independent company with a separately documented founder or headquarters.

Gamma Entertainment is the immediate corporate parent context for the 21Sextury portfolio. In January 2025, Byborg Enterprises acquired 100% of Gamma Entertainment, making Byborg the ultimate owner of the wider group while the individual 21Sextury brands continue to operate under their established names.