SITE.su is an online marketplace specializing in premium domain names, offering more than 40,000 domains for sale or rent across the .ru, .su, and .рф zones. Its catalog focuses on keyword-based names and includes search tools for finding domains by word, topic, or other parameters. Customers can view the full inventory online or download a list in Excel format, with details such as purchase and monthly rental prices, domain age, and search-related indicators.

The marketplace provides two ways to secure a domain. Buyers can complete an online purchase, with administration rights transferred immediately. Renters can use the domain by assigning their own DNS servers, with agreements offering a priority right to purchase during the rental period and a fixed buyout price. Rental terms can last up to 50 months. The site also supports price inquiries and offers, alongside help and online chat through its assistance section. SITE.su serves businesses and individuals seeking a domain for a website, brand, or online project.