SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains for purchase or rental. Its listings include keyword-rich and other domain names across the .ru, .su, and .рф zones, with prices and available rental rates displayed for each option. Customers can buy domains online with immediate transfer or rent them by assigning their own DNS servers. Rental agreements include a guaranteed right to buy, giving users a route from temporary use to ownership.

The marketplace supports browsing the full domain catalogue, downloading a spreadsheet of listings, and searching by keywords or more detailed criteria. Listing information may include domain age and search-related indicators. Prospective buyers and renters can submit questions or propose a price through the site’s contact form, while help and online chat are available in the Help section. The service is designed for businesses and individuals seeking a web address for an online presence, with both immediate purchase and rental options to suit different needs and budgets.