SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains in the .ru, .su, and .рф zones. The service helps businesses and individuals find web addresses for brands, projects, and online ventures, offering search tools to browse domains by keywords, related terms, and other parameters. Visitors can view a full domain list online or download it as an Excel file, with available listings accompanied by information such as price, age, and selected traffic or search indicators.

Customers can purchase domains through an online checkout, with the site describing the transfer as immediate, or rent a domain by assigning their own DNS servers. Rental options include a guaranteed right to buy, and users can contact the marketplace to ask questions or propose a price. The website provides account access, a help section, and online chat, alongside contact and inquiry forms. By combining a large selection with both purchase and rental options, SITE.su offers a straightforward way to secure a domain name suited to a specific online identity.