SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains in the .ru, .su and .рф zones. The service helps individuals and businesses find and secure domain names through immediate online purchase or rental.

Buyers can purchase a domain online, with administrative rights transferred to them. Rental is charged by the calendar month and allows the renter to assign their own DNS servers. Rental agreements include a priority right to buy the domain during the agreement, with the purchase price fixed in the contract; agreements can run for up to 50 months.

SITE.su offers tools to search by keywords and other parameters, browse the full domain list, and download listings as an Excel file. Domain pages display available purchase and rental prices, alongside information such as registration age and search-related indicators. Customers can contact the team through the Help section and online chat, ask questions about a domain, or propose a price.