SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains in the .ru, .su, and .рф zones. Customers can browse listings, search by keywords or other parameters, and view domain information such as age and selected traffic or rating indicators. The marketplace serves businesses and individual projects seeking a suitable web address, with listings that include exact matches, transliterations, related terms, and translated alternatives.

SITE.su provides two ways to obtain a domain: immediate online purchase or monthly rental. A purchase includes transfer of domain administration rights, while rental allows the customer to assign their own DNS servers. Rental agreements include a priority right to buy the domain during the agreement, with the purchase price fixed in the contract; the maximum rental term is 50 months. The site also offers downloadable domain lists, a question and price-offer feature, and customer assistance through its Help section and online chat. Its services are designed to make finding, evaluating, and acquiring domain names straightforward.