SITE.su is an online marketplace specializing in premium domain names, with more than 39,000 listings across the .ru, .su, and .рф zones. The platform helps individuals and businesses find domain names suited to their projects, including keyword-based names and related alternatives such as translated, synonymous, or transliterated options.

Customers can purchase domains online, with administration rights transferred after purchase, or rent them by setting their own DNS servers. Rental agreements include a priority right to buy the domain during the rental period, with the purchase price fixed in the contract; agreements can run for up to 50 months. Listings show prices for purchase and monthly rental, and may include domain age and search-related indicators.

SITE.su provides domain search tools, including an advanced search, and allows visitors to view or download the full domain list as an Excel file. Customers can submit questions or price offers for individual domains, while the Help section provides contact details and online chat.