SITE.su is an online marketplace specializing in domain names, with more than 40,000 listings across the .ru, .su, and .рф zones. The service offers keyword-focused domains for businesses, websites, and personal projects, allowing customers to browse available names and choose between immediate purchase and monthly rental. Purchases are completed online, with domain administration rights transferred instantly. For rentals, customers can assign their own DNS servers; rental agreements include priority rights to buy the domain during the agreement, with the purchase price fixed in the contract. Rental terms can last up to 50 months.

Customers can search by one or several words, use expanded search options, view a full domain list, or download listings as an Excel file. The marketplace displays details such as asking prices, rental rates, domain age, and search-related indicators. Visitors can also ask questions about a domain or propose a price. SITE.su provides contact information and online chat through its help section, along with articles and reviews about domain selection and registration.