SITE.su is an online marketplace specializing in premium domain names, offering a catalog of more than 40,000 domains in the .ru, .su, and .рф zones. Customers can browse available names, search by keywords or other criteria, and download a complete domain list in Excel format. The marketplace supports both outright purchases and monthly rentals, with online ordering for either option.

A purchase transfers the rights to administer the domain, while a rental allows the customer to assign their own DNS servers. Rental agreements include a priority right to buy the domain during the rental period, with the purchase price fixed in the agreement. Contracts can run for up to 50 months. SITE.su also provides domain information, including age and search-related indicators, to help visitors assess listings. Customers can contact the marketplace through its help section and online chat, ask questions about a particular domain, or submit a price offer. The service is designed for individuals and businesses seeking a suitable web address without limiting them to an immediate purchase.