SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains available across the .ru, .su, and .рф zones. The service helps individuals and businesses find and secure domain names, including keyword-focused options such as kartingi.ru. Customers can purchase a domain online with immediate transfer or rent one by assigning their own DNS servers. Rental listings may include a guaranteed right to buy, giving customers a path from temporary use to ownership.

The marketplace provides tools to explore its inventory, including a searchable domain catalogue, advanced filters, and options to view or download the full list, with some listings featuring metrics such as age and search data. Buyers can complete eligible purchases or rentals through the site, while those who want to negotiate can submit a question or offer a price. SITE.su also offers account registration and login, customer support, and online chat through its help section.