SITE.su is an online marketplace specializing in premium domain names, including keyword domains and established websites in the .ru, .su, and .рф zones. The store says it offers more than 40,000 domains, giving individuals and businesses a broad selection of web addresses for projects, brands, and online ventures.

Customers can purchase a domain online with immediate transfer or rent one by assigning their own DNS servers. Rental options may include a guaranteed right to buy the domain later, offering a flexible alternative to an upfront purchase. Listings display purchase and monthly rental prices, and some include information such as domain age and search-related statistics.

SITE.su provides tools to browse the full domain catalogue, search by terms or parameters, and explore matching, related, translated, or transliterated names. Visitors can also download a domain list in Excel format. For a specific listing, prospective customers can contact the store with a question or price offer; help, contact details, and online chat are available through the site.