SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains in the .ru, .su, and .рф zones. The service enables customers to purchase a domain outright or rent it, with rental arrangements including a guaranteed right to buy. Domain purchases are completed online with immediate transfer, while rentals are set up by assigning the customer’s DNS servers. Listings include prices and, for selected domains, information such as age, ratings, and search statistics to help users compare options.

Customers can search by keywords, related terms, or other parameters, browse the full domain catalogue, and download a list for review. The marketplace supports instant purchase and rental through its online cart, while visitors who want to negotiate a price can send an inquiry about a particular domain. Registration and sign-in are available on the site, and customer assistance is provided through a Help section with contact details and online chat.