SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains offered across the .ru, .su, and .рф zones. The service enables customers to purchase a domain online or rent it by arranging for their own DNS servers to be assigned to the name. Purchases include an immediate transfer of domain administration rights. Rental agreements provide a priority right to buy the domain during the rental period, with the purchase price fixed in the contract; agreements can last up to 50 months.

Customers can browse the full domain inventory, download a list for review, or use advanced search to find names by keywords and other parameters. Listings display purchase and monthly rental prices, alongside information such as domain age and search-related ratings. For selected domains, visitors can submit a question or propose a price, and the site provides help, contact details, and online chat. SITE.su offers a practical way for businesses and individuals to find, acquire, or rent a domain for an online project.