SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 listings across the .ru, .su and .рф domain zones. The service enables individuals and businesses to purchase a domain or rent one, offering a broad catalog of keyword-based names and tools to help users find suitable options. Visitors can search by one or more terms, use advanced search filters, view the full domain list, or download listings with available metrics.

Purchases are handled online, with domain administration rights transferred to the buyer. Rental is arranged by allowing the customer to assign their own name servers; monthly pricing is shown for each domain. Rental agreements include a priority right to buy the domain at a price fixed in the contract, and may last up to 50 months. Listings can include domain age and SEO-related indicators based on Yandex Wordstat and Google and Yandex search data. SITE.su also provides a help section, contacts, online chat, and a form for asking questions or proposing a price.