SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains. It offers names in the .ru, .su and .рф zones, including keyword domains and other options for businesses, organizations and personal projects. Customers can purchase a domain online with immediate transfer or rent one by assigning their own DNS servers. Rental options may include a guaranteed right to buy the domain later.

The marketplace provides tools to browse its full domain list, search by words or other parameters, and download listings in Excel format. Each listing can include purchase and monthly rental prices, along with available age and rating information. Customers can also contact the seller about a specific domain, ask questions or propose a different price. Online chat and contact details are available in the Help section. SITE.su aims to make finding and securing a suitable web address straightforward, whether customers are ready to buy immediately or prefer to rent first.