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 service enables customers to search a broad catalog, review domain details, and choose between immediate purchase and monthly rental. Available listings include keyword-based names as well as related, translated, and transliterated options.

Purchases are completed online, with domain administration rights transferred to the buyer. For rentals, customers assign their own DNS servers, and the agreement includes priority rights to purchase the domain during the rental term, at a price fixed in the contract. Rental agreements can run for up to 50 months. The site also provides advanced search, downloadable domain lists in Excel, and contact options for questions or price offers. Customers can browse listings and use the online cart to start a purchase or rental, with account registration and sign-in available through the site. SITE.su presents domain details such as asking prices, rental rates, age, and selected search or rating indicators to help visitors compare options.