SITE.su is an online marketplace specializing in premium domain names, offering a catalog of approximately 39,000 to 40,000 domains. Customers can browse names in the .ru, .su, and .рф zones, including keyword domains, transliterations, and related terms. The store supports both online purchases and rentals, with options to rent a domain with a guaranteed right to buy it later. Purchases are completed online with immediate domain transfer, while renting involves assigning the customer’s DNS servers.

The marketplace provides tools to help users find suitable names, including search by one or more words, an extended search by criteria, and categorized listings of matching, transliterated, and synonymous domains. Visitors can view the full catalog online or download a spreadsheet containing domain information. Each listing can show its purchase and monthly rental price, age, and available ranking or search statistics. Customers can submit a question or price offer for a specific domain, and the site directs users to its Help section for contacts and online chat.