SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains in the .ru, .su, and .рф zones. The service enables customers to purchase a domain online with transfer of administrative rights or rent one by assigning their own name servers. Rental agreements include a priority right to buy the domain at a price fixed in the contract, and can run for up to 50 months.

Customers can search by keyword, explore related domain suggestions, use advanced search filters, and view a full catalog online or download a spreadsheet. Listings provide purchase and monthly rental prices, domain age, and search-related indicators. The marketplace also offers an inquiry form for questions or price proposals, plus contacts and online chat through its help section. SITE.su presents domain options for businesses and personal projects, including names suited to particular topics or audiences, and offers both immediate purchase and rental processes.