SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains, primarily in the .ru, .su, and .рф zones. Customers can browse listings, search by keywords or other parameters, view domain information, and download a complete inventory. The marketplace focuses on keyword-rich names, including Russian-language domains and transliterations, with listings that may include age and search-related rating data.

SITE.su offers two ways to obtain a domain: immediate online purchase, with administrative rights transferred to the buyer, or monthly rental, which allows the customer to assign their own DNS servers. Rental agreements include a priority right to purchase the domain at a price fixed in the contract, and may run for up to 50 months. Buyers and prospective renters can contact the marketplace to ask questions or make an offer, with help and online chat available through its support section. The service is designed for individuals and organizations seeking a memorable web address for an online project.