SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains listed across the .ru, .su, and .рф zones. The service helps businesses and individuals find keyword-based domain names and offers both immediate purchase and rental options. Buyers can complete a purchase online, with domain administration rights transferred immediately. For rentals, customers can use their own DNS servers, and agreements include a priority right to buy the domain at a price fixed in the contract. Rental periods are priced by the calendar month, and agreements can run for up to 50 months.

The marketplace provides domain search tools, including advanced search and listings with details such as age, price, and search-related indicators. Customers can view or download the full domain catalog, submit questions, and propose a price for a domain. Help, contact information, and an online chat are available through the site. SITE.su presents domain acquisition and rental as flexible options for establishing or developing an online presence.