SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains in the .ru, .su and .рф zones. Customers can browse, search by keywords or other parameters, view a full domain list, and download listings with available metrics. The marketplace provides both outright purchases and monthly rentals, with online transactions designed for immediate processing. A purchase transfers domain administration rights, while rental allows the customer to assign their own DNS servers. Rental agreements include a priority right to buy the domain during the rental period, with the purchase price fixed in the contract; agreements can run for up to 50 months.

Listings include details such as purchase and rental prices, domain age, and SEO-related indicators. For buyers who want to negotiate, SITE.su offers a contact form to ask questions or submit a price offer, as well as help and online chat. The service is intended for businesses and individuals seeking a suitable web address for a commercial venture, personal project, or online brand.