SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains, primarily in the .ru, .su, and .рф zones. The service helps businesses and individuals find names for websites, brands, and online projects, with listings searchable by keywords, transliterations, and related terms. Visitors can browse the full catalog, use advanced search filters, or download a domain list in Excel format.

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, and customers can contact the seller to ask questions or propose a price. Listings show purchase and monthly rental prices, along with available information such as domain age and search or rating metrics. A shopping-cart process supports direct purchases and rentals, while account access and assistance are available through the site. SITE.su presents domain names as flexible options for launching or developing a business or personal web project.