SITE.su is an online marketplace for premium domain names, offering around 40,000 domains across the .ru, .su, and .рф zones. Customers can browse listings, search by keywords or other parameters, view a complete domain list, or download listings in Excel. The marketplace supports both immediate purchase and monthly rental, with contact options and online assistance available through its Help section.

Purchasing transfers the rights to administer a domain, while renting allows customers to assign 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 contract; agreements can last up to 50 months. Listings provide details such as purchase and rental prices, domain age, and a rating based on search-related indicators. Customers can submit questions or price offers, and use an online cart to initiate a purchase or rental. SITE.su presents its service as a way for individuals and businesses to find and secure domain names suited to their online presence.