SITE.su is an online marketplace specializing in premium domain names for businesses, websites, and other digital projects. The store offers more than 40,000 domains, including keyword-based names in the .ru, .su, and .рф zones. Customers can browse available listings and use search tools to find domains by word, topic, spelling, synonyms, translations, or transliteration. An expanded search provides additional ways to narrow the selection, and the full domain catalogue can be viewed online or downloaded as an Excel file.

Domains are available for immediate purchase or rental. Online purchases include instant domain transfer, while renting involves assigning the customer’s DNS servers. The marketplace also offers rental with a guaranteed right to buy the domain later. Listing pages show prices and, for some domains, information such as age and ratings. Customers can add a domain to a purchase or rental cart, or contact the store to ask a question, discuss a listing, or propose a different price. Registration, account access, assistance, and online chat are available through the site.