SITE.su is an online marketplace specializing in premium domain names, with a catalog of around 40,000 listings across the .ru, .su, and .рф zones. Customers can browse, search, and compare domains, including keyword-based names and options in Cyrillic or transliterated forms. The platform supports instant online purchases, with domains transferred to the buyer, as well as rentals arranged by assigning the customer’s DNS servers. Selected rentals include a guaranteed right to purchase the domain later.

Shoppers can search by one or more words, use advanced search filters, view a full domain list, or download listings in Excel. Each listing may include purchase and monthly rental prices, domain age, ratings, and search-related statistics. For buyers seeking a particular name or hoping to negotiate, the site provides a contact form to ask questions or submit an offer; email and phone details are required. The marketplace also offers help information and online chat through its support section, guiding users through registration, search, purchase, and rental.