SITE.su is an online marketplace for premium domain names, offering a broad selection of roughly 40,000 domains across the .ru, .su, and .рф extensions. Customers can browse and search listings by keyword or other parameters, view a full inventory, and download a domain list with available statistics. The marketplace specializes in keyword-rich names, including Russian-language domains and transliterations, with listings displaying purchase and monthly rental prices alongside information such as domain age and search metrics.

Buyers can purchase a domain online with immediate transfer or rent it by assigning their own DNS servers. Rental agreements may include a guaranteed right to buy, giving customers an option to secure a name before committing to ownership. Each listing supports inquiries and price offers, allowing prospective customers to ask questions or negotiate. SITE.su also provides registration and sign-in, help resources, and an online chat or contact options. Its service is designed for businesses and project owners seeking a relevant web address for an online presence, with both outright purchase and flexible rental available.