SITE.su is an online marketplace specializing in premium domain names for buyers seeking memorable web addresses for businesses or personal projects. Its catalog lists tens of thousands of domains, mainly in the .ru, .su, and .рф zones, including keyword domains and names related to particular search terms. Customers can browse matching names, synonyms, translations, and transliterations, use an advanced search, or download the full catalog as an Excel file.

The marketplace offers both online purchase and rental. Purchases are completed online with immediate domain transfer, while rental lets customers assign their own DNS servers and includes a guaranteed right to buy the domain. Listings show prices in rubles and may include domain age and other available ratings or search statistics. Customers can place an order through the site, contact the marketplace with a question or price offer, and find assistance through its help section and online chat. SITE.su provides a practical way to compare and obtain domain names for establishing an online presence.