SITE.su is an online marketplace specializing in premium domain names, with more than 39,000 listings across the .ru, .su, and .рф domain zones. The service enables customers to browse and acquire domains through either immediate online purchase or monthly rental. Rental agreements can include a guaranteed right to buy, giving users a way to secure a domain before committing to ownership. Purchased domains are transferred online, while rentals are arranged by assigning the customer’s DNS servers.

The marketplace offers search tools for finding domains by keyword, related terms, transliteration, translation, and other criteria. Visitors can view the full domain list online or download a spreadsheet, with listings that may include purchase and rental prices, domain age, and search-related indicators. Customers can place an order directly using the purchase or rental option, or contact the team to ask a question or propose a price. Help information, contact details, and online chat are available through the site.