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 store serves businesses and individuals seeking a distinctive web address for a website or online project. Customers can purchase domains online, with ownership administration transferred immediately, or rent a domain by arranging for their own DNS servers to be assigned. Rental agreements include a priority right to buy the domain during the rental term, with the purchase price fixed in the contract; agreements can last up to 50 months.

The marketplace offers tools to browse the full domain catalogue, search by keywords and other parameters, and download domain listings in Excel. Listings include purchase and monthly rental prices, and may provide details such as domain age and search-related indicators. Customers can also ask questions about a domain or propose a price, with contact options and online chat available through the help section. SITE.su brings domain discovery, comparison, rental, and purchase together in one service.