SITE.su is an online marketplace specializing in premium domain names, offering more than 40,000 domains for businesses and personal projects. Its listings focus on keyword-based names in the .ru, .su, and .рф zones, with search tools to find domains by words, transliterations, and other criteria. Customers can browse the full catalogue online or download a domain list with available metrics.

The marketplace offers two ways to obtain a domain: purchase or rental. Purchases are completed online, with domain administration rights transferred immediately. Rental is priced by the calendar month and works by assigning the customer’s DNS servers. Rental agreements include a priority right to buy the domain during the agreement period, with the purchase price fixed in the contract; the maximum agreement term is 50 months. The site also provides domain information such as age and search-related indicators. Customers can submit questions or price offers through the site, and assistance and online chat are available in the Help section.