SITE.su is an online marketplace specializing in premium domain names, with a catalogue of more than 40,000 domains, including options in the .ru, .su, and .рф zones. The platform serves individuals and businesses seeking distinctive web addresses for websites, brands, or other online projects. Customers can browse available names, search by keywords or other parameters, view a full domain list, and download catalogue data in Excel format.

SITE.su offers both immediate online purchases and monthly domain rentals. A purchase transfers the domain’s administration rights, while rental allows customers to use the domain by assigning their own DNS servers. Rental agreements include a priority right to buy the domain, with the purchase price fixed in the contract; agreements may run for up to 50 months. The marketplace also supports enquiries and price offers for individual domains, with assistance available through its help section and online chat. Listings provide prices and, where available, information such as domain age and ratings, helping customers compare options before choosing a name.