SITE.su is an online marketplace specializing in premium domain names, offering more than 40,000 domains in the .ru, .su, and .рф zones. The service helps businesses and individuals find domain names for websites, brands, and other projects, with search tools for matching words and domain characteristics. Customers can browse the available listings, view prices and selected domain details, or download a full inventory as an Excel file.

Domains are available for immediate purchase or monthly rental. A purchase transfers the rights to administer the domain, while rental allows the customer to assign their own DNS servers. Rental agreements include a priority right to buy the domain during the agreement and set the purchase price in advance; agreements may run for up to 50 months. Customers can also contact the marketplace to ask questions or propose a price. SITE.su provides account access, help and online chat, along with information about its sales and rental terms. The service presents domain options with listed purchase and rental prices to support comparison and selection.