SITE.su is an online marketplace specializing in domain names, offering a catalogue of more than 40,000 names across the .ru, .su and .рф zones. Customers can browse and search for keyword domains, explore related names, and use advanced search options to find addresses that suit a business, brand or project. The site also provides a downloadable domain list, with some listings displaying information such as domain age and search-related indicators.

Domains are available for immediate purchase or monthly rental. A purchase includes the transfer of domain administration rights, while rental allows the customer to assign their own DNS servers. Rental agreements include a priority right to buy the domain during the agreement, with the purchase price fixed in the contract; agreements can last up to 50 months. Customers can contact the marketplace with questions or a price offer, and assistance is available through the Help section and online chat. SITE.su presents its services as a flexible way to secure a web address without requiring an immediate purchase.