SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains, primarily in the .ru, .su, and .рф zones. Customers can browse listings, search by keywords or other parameters, view domain details, and download a complete catalogue with metrics such as age and search-related ratings. The marketplace serves businesses and individuals looking for a domain for a website, brand, or online project.

SITE.su provides two ways to obtain a domain: immediate online purchase, with transfer of administration rights, or monthly rental, which allows the renter to assign their own DNS servers. Rental agreements include a priority right to buy the domain during the contract, with the purchase price fixed in advance; agreements can last up to 50 months. Listings display purchase and rental prices, and customers can contact the marketplace to ask questions or propose a price. The site also offers help, contact information, and online chat. Its catalogue includes keyword domains such as goroskopiki.ru and related names in Russian-language domain zones.