SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains available across the .ru, .su, and .рф zones. The service enables individuals and businesses to purchase a domain or rent one, including keyword-focused names that may suit a website, business, or online project. Buyers can complete purchases online, with domain administration rights transferred immediately. For rentals, customers assign their own DNS servers, and agreements include a priority right to buy the domain during the rental term. The purchase price is fixed in the rental agreement, which can last up to 50 months.

Visitors can search domains by one or more words, use advanced search options, view matching names, or download a complete domain list in Excel. Listings may include details such as purchase and monthly rental prices, domain age, and search-related indicators. Customers can also ask questions or propose a price through the site’s contact form, with assistance and online chat available in the Help section.