SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains offered for sale or rent. Its listings cover the .ru, .su, and .рф zones and include keyword-based names, translated terms, and transliterations. Customers can browse available domains, use advanced search, view listing details such as age and search-related indicators, or download a full inventory for review.

The marketplace provides instant online purchasing, with domain administration rights transferred to the buyer, as well as monthly rentals that allow customers to use their own DNS servers. Rental agreements include a priority right to buy the domain during the rental period, with the purchase price set in the agreement; contracts can run for up to 50 months. Buyers and prospective renters can contact the service to ask questions or propose a price, and the site offers help and online chat through its support section. SITE.su is designed to make domain selection and acquisition straightforward for businesses and individuals seeking a suitable online address.