SITE.su is an online marketplace specializing in domain names, with more than 40,000 listings across the .ru, .su and .рф zones. The service helps businesses, entrepreneurs and individuals find a web address for a new project or acquire a domain that matches a chosen keyword or topic. Customers can purchase domains online with immediate transfer or rent them by assigning their own DNS servers. Rental listings include a guaranteed right to buy, offering a way to use a domain before deciding to acquire it.

The marketplace provides instant purchase and rental options, an expanded search for filtering listings, and downloadable domain catalogs in Excel format. Visitors can view prices, domain ages and available rating or search-statistics information where listed. Customers may also contact the seller with a question or price offer; an email address and telephone number are required for inquiries. Support and online chat are available through the Help section, while account access is provided for registration and sign-in.