SITE.su is an online marketplace specializing in premium domain names, offering a selection of more than 40,000 domains, primarily in the .ru, .su, and .рф zones. Customers can browse listings, search by keywords or other parameters, view the full domain list, or download listings in Excel. The marketplace supports both immediate purchase and rental, with online transactions and domain transfers described as available instantly.

For rentals, customers can assign their own DNS servers. Rental agreements include a priority right to purchase the domain during the agreement, with the purchase price fixed in the contract. The site states that rental agreements can last up to 50 months. Each listing may show its purchase and monthly rental prices, domain age, and a rating based on search-related indicators, including Yandex Wordstat and Google and Yandex indexes. Customers can contact the marketplace through its help section or online chat, ask questions about a domain, or propose a price. SITE.su serves individuals and businesses seeking domain names for websites and online projects.