SITE.su is an online marketplace specializing in premium domain names, offering more than 40,000 domains for purchase or rental across the .ru, .su, and .рф extensions. Its catalog includes keyword-based domains and names related to a range of topics, with listings that display prices and, where available, details such as registration age and search-related indicators. Customers can browse the full inventory, download a domain list, or use advanced search to find names by relevant terms and criteria.

The service supports instant online purchases, with domain administration rights transferred to the buyer, and monthly rentals that allow customers to assign their own DNS servers. Rental agreements include a priority right to purchase the domain at a price fixed in the contract; the stated maximum rental term is 50 months. Buyers and prospective renters can submit questions or price offers, and the site provides help, contact information, and online chat. SITE.su is designed for individuals and businesses seeking a suitable web address, whether they want to acquire a domain outright or use it through a rental arrangement.