SITE.su is an online marketplace specializing in premium domain names, offering more than 40,000 domains across the .ru, .su, and .рф zones. The service helps businesses and individuals find domain names for websites, brands, and online projects, with listings that include keyword-based names and related alternatives. Customers can buy domains online for immediate transfer or rent them by assigning their own DNS servers. Rental options may include a guaranteed right to purchase, giving customers a way to use a domain before deciding to acquire it.

The marketplace supports instant purchases and rentals through listing controls, and users can search by keywords or use advanced filters to explore available names. SITE.su also provides downloadable domain lists, including information such as age and ratings, to help shoppers compare options. For questions or price negotiations, customers can contact the seller through the help section, online chat, or a domain inquiry form. The site presents prices in rubles and is designed to make browsing, evaluating, and securing domain names straightforward.