SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains across the .ru, .su, and .рф zones. It helps individuals and businesses find domain names suited to their projects, including keyword-based names and options related to specific industries or topics. Customers can purchase domains online with immediate transfer or rent them by assigning their own DNS servers. Rental agreements include a guaranteed right to buy the domain, offering a route to ownership later.

The marketplace provides tools to browse the full domain list, download catalog data, and search using multiple words or advanced parameters. Listings display purchase and monthly rental prices, and may include details such as domain age and available rating or search statistics. Buyers can place an order through the site or contact the seller to ask questions and propose a price. Help resources, contact information, and online chat are available through the support section. SITE.su presents domain acquisition and rental as flexible ways to establish a distinctive online identity.