SITE.su is an online marketplace for premium domain names, offering a catalog of approximately 40,000 domains in the .ru, .su, and .рф zones. Customers can browse keyword-based domains and related website names, then purchase or rent a suitable address. Purchases can be completed online with immediate domain transfer, while rentals are arranged by assigning the customer’s DNS servers; rental options may include a guaranteed right to buy the domain later.

The marketplace provides search tools for finding domains by one or more words or other parameters. Visitors can view the complete catalog, download domain lists in Excel format, and review available information such as domain age and listed ratings. For domains that invite negotiation, customers can send a question or propose a price through the site. A shopping cart supports the purchase and rental processes, and users can sign in to their accounts. SITE.su also directs customers to its Help section for contact details and online chat, providing assistance with browsing and domain transactions.