SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains in the .ru, .su, and .рф zones. The service enables customers to browse listings, search by keywords or other parameters, and compare available names, including related and synonymous options. Domains can be purchased online with immediate transfer or rented by assigning the customer’s DNS servers. Rental listings include an option to secure the right to buy the domain, while buyers and renters can also contact the marketplace to ask questions or propose a price.

SITE.su provides tools to view the full domain catalogue, download listings in Excel, and review information such as asking prices, rental rates, domain age, and search-related figures where available. Online chat and contact details are provided through the help section. The site presents individual listings with separate purchase and monthly rental prices, and supports account registration and sign-in for customers using its marketplace.