SITE.SU is an online marketplace for premium domain names, offering more than 40,000 domains across the .ru, .su, and .рф extensions. Its service helps individuals and businesses find and secure domain names for websites, brands, and online projects. Customers can purchase domains online with immediate transfer or rent them by assigning their own DNS servers. The marketplace also offers rental agreements with a guaranteed right to buy, giving customers an option to acquire a domain after renting it.

Visitors can browse the full domain catalogue, download a list for review, or use advanced search to find names by keyword, related terms, or transliteration. Listings show purchase and monthly rental prices, with selected entries also displaying domain age and ratings. For a specific domain, customers can submit a question or propose a price; the site provides contact support and online chat through its help section. SITE.SU presents domain acquisition and rental as flexible options for establishing an online presence, with examples available in several categories and price ranges.