SITE.su is an online marketplace for premium domain names, offering a catalog of approximately 40,000 domains, including names in the .ru, .su, and .рф zones. Customers can purchase a domain or rent it, with options for immediate online transactions. A purchase transfers domain administration rights, while rental allows the customer to designate their own name servers. Rental agreements include a priority right to buy the domain during the rental period, with the purchase price fixed in the contract; agreements can last up to 50 months.

The marketplace provides tools to browse the full domain inventory, download listings, and search by keyword or other parameters. Customers can also ask questions about a domain or propose a price, with contact and online chat support available through the Help section. Listings show purchase and monthly rental prices, domain age, and search-related indicators. SITE.su presents domain names for a range of uses, helping customers find and secure an online address for a brand, business, or project.