SITE.su is an online marketplace specializing in domain names, with a catalog of more than 40,000 domains, primarily in the .ru, .su, and .рф zones. The service enables individuals and businesses to find and acquire domain names for their websites, brands, or projects. Customers can purchase a domain or rent it by the month, with listings showing prices and, where available, details such as domain age and search-related indicators.

Purchases are completed online, with domain administration rights transferred immediately. For rentals, customers can assign their own DNS servers, and the rental agreement provides a priority right to buy the domain during the contract period. The purchase price is fixed in that agreement, and rental contracts can run for up to 50 months. SITE.su also offers domain search tools, a complete catalog view, and downloadable domain listings in Excel format. Customers can contact the marketplace through its help section or online chat, ask questions about a specific domain, and submit a proposed price.