SITE.su is an online marketplace specializing in premium domain names for businesses, projects, and individuals. Its catalog features tens of thousands of domains, including keyword-based names and options in the .ru, .su, and .рф extensions. Visitors can browse available listings, search by words or other parameters, view related or translated domain suggestions, and download the full catalog as an Excel file.

The marketplace offers both domain purchases and rentals. Customers can complete eligible purchases online, with the site describing the transfer as immediate, or rent a domain by assigning their own DNS servers. Some rental arrangements include a guaranteed right to purchase the domain later. Listings display purchase and monthly rental prices, and may include information such as domain age and rating.

For buyers who want to discuss a listing or propose a different price, SITE.su provides an inquiry form and directs customers to its Help section for contacts and online chat. The service also offers account registration and login for customers managing their domain searches and transactions.