SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains for purchase or rent in the .ru, .su, and .рф zones. Its catalogue includes keyword-based names and domains related to specific topics, with listings that show prices, registration age, and search-related indicators. Customers can browse the full inventory, download a domain list, or use advanced search to find names matching one or more terms.

The marketplace supports immediate online purchases, with domain administration rights transferred to the buyer, and monthly rentals that allow customers to use their own DNS servers. Rental agreements include a priority right to buy the domain at a price fixed in the contract, and may run for up to 50 months. Visitors can submit an offer or ask a question about a domain, with contact options and online chat available through the help section. SITE.su provides a practical way for businesses and individuals to secure a relevant web address without committing to an immediate purchase.