SITE.su is an online marketplace specializing in premium domain names. It offers more than 40,000 domains, primarily in the .ru, .su, and .рф zones, for purchase or monthly rental. The catalog includes keyword-based names and related variants, with listings showing prices and, for selected domains, information such as age and search-related indicators. Customers can browse the full catalog, download a spreadsheet, or use an advanced search to find names by keywords and other criteria.

Purchases are completed online, with domain administration rights transferred immediately. For rentals, customers assign their own DNS servers, and agreements provide a priority right to buy the domain during the rental term at a price fixed in the contract. Rental terms can extend up to 50 months. The site also supports questions and price offers through its contact form, with help and online chat available in the Help section. SITE.su serves businesses and individuals seeking a domain for a website, online project, or brand presence.