SITE.su is an online marketplace specializing in domain names, with a catalog of more than 40,000 names, including keyword domains in the .ru, .su, and .рф zones. The service enables customers to purchase a domain or rent it, with online transactions available for both options. A purchase transfers the domain’s administration rights, while rental gives the customer the right to set its DNS servers. Rental agreements include priority rights to buy the domain during the agreement and specify the purchase price; agreements can last up to 50 months.

Customers can search by one or several words, use advanced search parameters, browse matching and transliterated domains, or view and download the full domain list. Listings provide purchase and monthly rental prices, and may also show domain age and search-related indicators. Customers who wish to discuss a domain or propose a different price can submit an inquiry. SITE.su also provides a help section with contact details and online chat, along with account registration and sign-in options.