SITE.su is an online marketplace specializing in premium domain names, with a catalogue of more than 40,000 domains across the .ru, .su, and .рф zones. The platform enables customers to browse, search, and acquire domain names through immediate online purchase or rental. Purchased domains are transferred to the buyer, while rental gives the customer the right to set the domain’s name-server addresses. Rental agreements include a priority right to buy the domain, with the purchase price fixed in the contract; agreements can last up to 50 months.

Customers can explore the full domain list, download a spreadsheet, or use advanced search to find names by relevant terms and other parameters. Listings may include information such as purchase and rental prices, domain age, and search-related indicators. For a specific domain, visitors can submit a question or proposed price, with email and telephone details required. The site also provides registration and sign-in options, as well as a help section with contact information and online chat.