SITE.su is an online marketplace specializing in premium domain names, offering a catalogue of more than 40,000 domains, primarily in the .ru, .su and .рф zones. Customers can browse available names, search by keyword or other parameters, view related transliterated domains, and download a complete domain list in Excel format. The marketplace supports both immediate purchase and monthly rental, with online transactions designed to make domain acquisition straightforward.

A purchase transfers the rights to administer a domain, while rental allows the customer to use it by assigning 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 contract; agreements can last up to 50 months. Listings show prices, domain age and a rating based on search-related data, including Yandex Wordstat and Google and Yandex indicators. Customers can submit questions or price offers through the site, and the Help section provides contact details and online chat.