SITE.su is an online marketplace specializing in premium domain names, offering customers a choice of more than 39,000 domains across the .ru, .su, and .рф zones. The platform serves businesses and individuals looking to acquire a domain for a website, brand, or personal project. Customers can browse available names, search by keywords or other parameters, and review related domain suggestions, including synonyms and transliterations.

SITE.su offers two ways to obtain a domain: immediate online purchase and monthly rental. Purchases include the transfer of domain administration rights, while rentals allow customers to use their own DNS servers. Rental agreements include a priority right to purchase the domain during the rental period, with the purchase price specified in the agreement; contracts may run for up to 50 months. The marketplace displays pricing and domain information, and provides options to view or download its full listings. Customers can contact the service through its help section, online chat, or domain inquiry form to ask questions or propose a price.