SITE.su is an online marketplace specializing in premium domain names, particularly keyword-focused domains in the .ru, .su, and .рф extensions. The store lists tens of thousands of names and gives customers options to buy a domain outright or rent it, with online ordering designed for immediate transactions. A purchase transfers domain administration rights, while rental allows the customer to assign their own name servers. Rental agreements include a priority right to buy the domain, with the purchase price set in the agreement; contracts may last up to 50 months.

Customers can search by one or more words, use advanced search filters, browse the full domain list, or download listings for review. Each listing may include purchase and monthly rental prices, domain age, and rating information. For those interested in negotiating, SITE.su provides a question and offer form, along with help and online chat through its support section. The marketplace serves individuals and businesses seeking memorable web addresses for projects, brands, or online services.