SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 listings across the .ru, .su, and .рф zones. The service helps businesses and individuals find web addresses suited to a brand, product, or personal project, offering domain searches by keyword, transliteration, translation, and other criteria. Visitors can browse the full catalog, use extended search, or download a domain list with available ranking information.

Domains can be purchased online with immediate transfer or rented by assigning the customer’s DNS servers. The marketplace also offers rental with a guaranteed right to buy, giving customers a way to use a domain before acquiring it. Listings show purchase and monthly rental prices, and may include domain age and search-related statistics. Customers can submit questions or propose a price for a specific name, with contact options and online chat available through the help section. The site provides online account access and a shopping-cart process for both purchases and rentals, making it possible to review and select available domains directly through the marketplace.