SITE.su is an online marketplace specializing in premium domain names, offering a catalog of more than 40,000 domains in the .ru, .su, and .рф zones. Customers can browse available names, search by keyword or other parameters, view domain details, and download the full catalog as an Excel file. The marketplace supports both immediate purchases and domain rentals, with online transactions and assistance available through its help section and chat.

Purchasing transfers domain administration rights to the buyer. Rental provides the right to change the domain’s name server settings and includes a priority right to buy the domain during the rental term. The purchase price is set in the listing, while rental is charged monthly; rental agreements can last up to 50 months and specify the buyout price. Customers can also contact the marketplace to ask questions or propose a price. Listings may include details such as domain age and search-related rating indicators, helping prospective buyers assess available names.