SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains advertised for customers to browse. Its listings focus on the .ru, .su, and .рф zones and include both Latin-script and Cyrillic names. Customers can purchase a domain online with immediate transfer or rent it by assigning their own DNS servers. The marketplace also offers rental with a guaranteed right to buy, giving customers an option to secure a name before purchasing it.

Visitors can search by words, themes, and other parameters, view a full domain list, or download listings in Excel. Domain pages show purchase and monthly rental prices, and may include details such as domain age and search or rating statistics. Customers who want to negotiate can submit a question or price offer through the site; contact options and online chat are available in the Help section. SITE.su serves businesses and individuals looking for a web address for a website, online store, or personal project, with both self-service browsing and direct assistance.