SITE.su operates an online marketplace for premium domain names, offering more than 40,000 domains across the .ru, .su, and .рф zones. The service helps businesses, individuals, and web project owners find memorable, keyword-based names for their websites and brands. Customers can browse the full domain catalogue, search by word or parameters, explore related and synonymous names, and download listings with available statistics.

Domains can be purchased online with immediate transfer of administrative rights, or rented by assigning the customer’s DNS servers. Rental is priced monthly, and the agreement provides a priority right to buy the domain during the rental period, with the purchase price fixed in the contract. The marketplace displays pricing and, for selected domains, details such as age and search-related metrics. Buyers can also contact the site to ask questions or make an offer. SITE.su provides help and online chat through its support section, as well as account registration and login for customers managing domain transactions.