SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains across the .ru, .su, and .рф zones. The service helps businesses and online project owners find, purchase, or rent a domain, including keyword-based names. Buyers can complete a purchase online, with domain administration rights transferred immediately. For customers who prefer to rent, the marketplace offers monthly agreements that allow them to use the domain by assigning their own DNS servers. Rental contracts include a priority right to buy the domain, with the purchase price fixed in the agreement; contracts can last up to 50 months.

SITE.su provides search tools to explore domains by name or other parameters, as well as options to view or download the full inventory in Excel. Listings include details such as purchase and rental prices, domain age, and SEO-related indicators. Customers can contact the marketplace with questions or price offers through its help section and online chat.