SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 39,000 listings across the .ru, .su, and .рф extensions. The service enables customers to purchase domains online with immediate transfer or rent them by assigning their own DNS servers. Rental arrangements can include a guaranteed right to buy, offering businesses and individuals a way to use a domain before deciding on ownership.

Visitors can search by keyword, explore related and similar domain names, and use advanced search options to find listings that fit their needs. The marketplace displays purchase and monthly rental prices, along with available details such as domain age and selected search and rating metrics. Customers can browse the full catalog, download a domain list in Excel, add domains to a purchase or rental cart, and submit questions or price offers through an inquiry form. Help information and online chat are available through the site. SITE.su presents its inventory as a resource for finding memorable web addresses for business and personal projects.