SITE.su is an online marketplace for premium domain names, offering more than 40,000 listings in the .ru, .su and .рф domains. Customers can browse names by keyword, explore related or translated terms, and use advanced search to find options suited to a business or personal project. The catalog includes individual domains with displayed purchase and monthly rental prices, alongside information such as age and search metrics for some listings.

The marketplace supports both immediate online purchase, with instant domain transfer, and rental through assignment of the customer’s DNS servers. Selected rental arrangements include a guaranteed right to buy the domain later. Visitors can view or download the full domain list, including a spreadsheet option, and contact the seller to ask questions or propose a price. Online chat and contact details are available through the help section. Orders can be initiated directly from the listings using purchase or rental options, while account access is provided for registration and sign-in.