SITE.su is an online marketplace specializing in premium domain names. Its catalogue includes more than 40,000 domains across the .ru, .su and .рф zones, with options to buy or rent names through the website. Buyers can complete an online purchase with immediate transfer of domain administration rights. Rental gives customers the right to set their own DNS servers and includes a priority option to purchase the domain during the rental term, at a buyout price set in the agreement. Rental is priced monthly, and agreements can run for up to 50 months.

The marketplace provides tools to search by keywords or other parameters, browse the full domain list, and download listings in Excel format, including available rating data. Customers can also contact the site about a specific domain or submit an offer. SITE.su presents information such as domain age and indicators based on Yandex Wordstat and search-engine data to help visitors assess names.