SITE.su is an online marketplace specializing in premium domain names for businesses and personal projects. Its catalog features more than 40,000 domains, including keyword-based names in the .ru, .su, and .рф extensions. Customers can browse available listings, search by words or other criteria, view a complete domain list, or download catalog information in Excel format.

The marketplace offers both immediate purchase and rental. Purchases are completed online, with domain administration rights transferred to the buyer. Rental allows customers to use a domain by setting their own DNS servers, and the rental agreement includes a priority right to buy the domain at a price fixed in the contract. Rental is priced by the calendar month and can run for up to 50 months.

Listings provide details such as purchase and monthly rental prices, domain age, and a rating based on search-related data. Customers can ask questions, propose a price, or contact the service through its help section and online chat.