SITE.su is an online marketplace specializing in domain names, offering a catalog of more than 40,000 domains, primarily in the .ru, .su, and .рф zones. The service helps individuals and businesses find keyword-based web addresses and acquire them through either purchase or rental. Buyers can complete an online purchase with immediate domain transfer, while rental arrangements are set up by assigning the customer’s DNS servers. The marketplace also offers rentals with a guaranteed right to buy, providing an option to secure a domain before making a purchase.

Customers can browse the full domain list, download listings, or use advanced search to find names by selected criteria. Listings include purchase and monthly rental prices, and may show details such as domain age and search-related statistics. For a specific domain, prospective customers can submit a question or offer a price, with email and phone details required. SITE.su also provides a help section and online chat for assistance.