SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains for sale or rent. Its listings focus on keyword-rich names in the .ru, .su, and .рф zones, with options suited to businesses and online projects seeking a memorable web address. 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, providing a path from temporary use to ownership.

The marketplace provides tools to browse the full domain catalogue, search by keywords and other parameters, and download listings in Excel, including available domain statistics. Listings show purchase and monthly rental prices, alongside information such as domain age and search or indexing indicators where provided. Buyers can add domains to a cart for immediate purchase or rental, and those interested in negotiating can submit a question or price offer. SITE.su also offers registration and sign-in, help resources, and contact options, including online chat.