SITE.su is an online marketplace specializing in premium domain names. Its catalog features more than 40,000 domains, including keyword-based names and websites in the .ru, .su, and .рф zones. Customers can browse available domains, search by words or other parameters, view related and transliterated suggestions, and download the full catalog in an Excel file.

The marketplace offers two ways to obtain a domain: purchase or monthly rental. Purchases are completed online, with domain administration rights transferred to the buyer. Rental allows customers to assign their own DNS servers and includes a contractual priority right to buy the domain during the rental period, at a price fixed in the agreement. Rental contracts can run for up to 50 months.

Listings display purchase and rental prices, along with information such as domain age and search-related indicators. Customers can contact the marketplace with questions or propose a price through its inquiry form, and online chat and assistance are available in the Help section.