SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains available across the .ru, .su, and .рф zones. The platform helps businesses and individuals find memorable, keyword-focused web addresses, offering both immediate purchase and monthly rental. Purchases are completed online with prompt transfer of domain administration rights. Rental gives customers the ability to assign their own DNS servers and includes a priority right to buy the domain during the agreement; the purchase price is fixed in the rental contract, which can run for up to 50 months.

Visitors can search by words or topics, use advanced search filters, browse the full domain inventory, or download a spreadsheet of listings and metrics. Domain pages display details such as price, age, and search-related indicators. Customers can contact the marketplace through its Help section and online chat to ask questions or propose a price. SITE.su presents domain options for a range of projects, with listings that include Russian-language, transliterated, and international keyword names.