SITE.su is an online marketplace specializing in premium domain names, offering more than 40,000 domains across the .ru, .su, and .рф zones. Customers can browse keyword-based domain names, search by terms or other parameters, and view listings with details such as price, age, and selected traffic or search metrics. The marketplace supports both outright purchases and monthly rentals, with prices shown in rubles.

Purchases are completed online, with domain administration rights transferred immediately. For rentals, customers assign their own DNS servers, and the rental agreement includes priority rights to buy the domain. Buyers and prospective tenants can contact the seller to ask questions or propose a price, and online chat and support information are available in the help section. The site also provides options to view or download the full domain list, including a spreadsheet export with metrics. SITE.su is designed for businesses and individuals seeking a domain for an online presence, project, or website, with examples ranging from short Latin-character names to Russian-language domains.