SITE.su is an online marketplace specializing in premium domain names, offering more than 40,000 domains across the .ru, .su, and .рф extensions. Customers can browse listings, search by keywords or other parameters, view a complete domain list, or download listings in Excel format. The service supports both outright purchases and monthly rentals, with online transactions designed for immediate processing.

A purchase transfers domain administration rights to the buyer. Under a rental agreement, customers can assign their own DNS servers and receive a priority right to purchase the domain during the rental period; the buyout price is set in the agreement. Rental contracts can last up to 50 months. Listings include details such as purchase and rental prices, domain age, and indicators related to search interest and SEO appeal.

SITE.su also provides an online inquiry option for questions or price offers, along with help, contact information, and chat support. Its marketplace is intended for businesses and other projects seeking a distinctive domain address.