SITE.su operates 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 details, and download the full inventory as an Excel file. The catalog includes names that match, translate or transliterate search terms, with information such as prices, age and selected traffic or search indicators.

The marketplace supports both outright purchases and monthly rentals. Purchases can be completed online, with immediate domain transfer, while rental involves assigning the customer’s DNS servers. Some rental offers include a guaranteed right to buy the domain later. Visitors can place an order through the shopping cart or contact the seller to ask questions and propose a price; the site also provides registration, login, help and online chat.

SITE.su presents its service as a way for businesses and individuals to find a domain for an online project. Its listings include individual names such as kodery.ru, alongside related options in Russian and Latin-script forms.