SITE.su is an online marketplace for premium domain names, offering a catalogue of approximately 40,000 domains in the .ru, .su and .рф zones. Customers can search by words or topics, use advanced search options, browse the full inventory, or download a domain list in Excel. The marketplace supports both outright purchases and rentals, with online transactions designed for immediate processing.

When a domain is purchased, its administration rights are transferred to the buyer. Rental gives the customer the right to set the domain’s name servers for a monthly fee. Rental agreements include a priority right to buy the domain during the agreement, with the purchase price fixed in the contract; agreements can last up to 50 months. Listings show details such as purchase and rental prices, domain age and SEO-related ratings based on search data and keyword indicators. Visitors can contact the marketplace through its help section or online chat, ask questions about a domain, and propose a price.