SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains in the .ru, .su, and .рф zones. Customers can browse listings, search by keywords or other parameters, view domain information, and download a complete catalog. The marketplace supports both immediate purchase and rental, with online ordering through its website and assistance available through a help section and online chat.

Purchasing a domain transfers its administration rights to the buyer. Rental is charged monthly and allows the customer 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; contracts may last up to 50 months. The site also provides domain details such as age and search-related ratings to help customers assess listings. Buyers can contact the marketplace with questions or make an offer on a domain. SITE.su presents its service as a way for individuals and businesses to find and secure domain names for their online presence.