SITE.su is an online marketplace specializing in premium domain names, including keyword-focused domains in the .ru, .su and .рф zones. The store offers a selection of more than 40,000 domains for businesses, personal projects and other website owners seeking a distinctive web address. Customers can browse the full inventory, download a domain list, or use advanced search to find names by specific criteria.

Domains are available for immediate online purchase or rental. A purchase transfers domain administration rights, while rental allows the customer to assign their own name servers for the agreed term. Rental agreements include a priority right to buy the domain, with the purchase price fixed in the contract; the maximum rental period is 50 months. Listings display prices and may include details such as domain age and search-related metrics.

Customers can submit a question or price proposal for a domain, and the site provides contact information and online chat through its Help section.