SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains available across the .ru, .su and .рф zones. The service helps individuals and businesses find keyword-focused domains for websites, brands and online projects. Customers can browse the full inventory, search by one or more terms, use advanced search filters, or download a complete domain list with available metrics.

Domains can be purchased online, with the transfer of administrative rights described as immediate, or rented by the calendar month. Rental gives the customer the ability to assign their own DNS servers and includes a contractual priority right to buy the domain during the rental period; the purchase price is fixed in the agreement. Rental contracts can last up to 50 months. Listings show details such as purchase and monthly rental prices, domain age and a rating based on search-related indicators. Customers can contact the marketplace through its Help section or submit a question or price offer for a specific domain.