SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains, including names in the .ru, .su, and .рф zones. The service enables customers to search by keyword and browse domains with matching names, translations, or transliterations. Users can also view a full catalog, download domain listings, and use advanced search tools to compare available options.

Domains can be purchased online, with immediate transfer of administration rights, or rented by assigning the customer’s DNS servers. Rental is priced by the month and includes a contractual priority right to buy the domain during the rental period, with the purchase price fixed in the agreement. Rental contracts can run for up to 50 months. The marketplace displays prices and, where available, domain age and search-related rating information. Customers can submit an offer or ask a question about a specific domain through the site, and the Help section provides contact details and online chat.