SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains, including keyword-based names in the .ru, .su, and .рф zones. The service enables customers to purchase a domain or rent it, with online transactions designed for immediate processing. A purchase transfers the rights to administer the domain, while rental gives the customer the right to change its name-server settings. Rental agreements include priority rights to buy the domain during the rental period, with the purchase price fixed in the contract; agreements can last up to 50 months.

Customers can browse the full domain inventory, download a list for review, or use advanced search to find names by selected criteria. Listings may include purchase and monthly rental prices, domain age, and search-related indicators. For domains with listed prices, shoppers can proceed through the purchase or rental options, while those wishing to negotiate can submit an inquiry or offer. SITE.su also provides registration and login, help resources, and contact options including online chat.