SITE.su is an online marketplace specializing in premium domain names, offering a catalog of more than 39,000 domains across the .ru, .su, and .рф extensions. Customers can browse listings, search by keywords or other parameters, view a downloadable catalog, and ask questions or make an offer through the site’s help and contact options.

The marketplace provides two ways to obtain a domain: purchase or rental. Purchases are handled online, with domain administration rights transferred to the buyer. For rentals, customers can assign their own DNS servers; rental terms include a priority right to purchase the domain, with the buyout price specified in the agreement. Rental prices are listed per calendar month, and agreements can run for up to 50 months.

Listings display details such as purchase and rental prices, domain age, and a rating based on search-related indicators. SITE.su also offers information and articles about individual domains to help visitors assess their potential for online projects. The site supports account registration and provides an online chat and contact channels.