SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 39,000 domains across the .ru, .su, and .рф extensions. The service helps businesses and individuals find domain names for websites, brands, and other online projects, with listings searchable by keywords and related terms. Customers can browse the full catalog, use advanced search, or download a domain list with available metrics.

SITE.su offers both outright purchases and rentals. Purchases can be completed online, with immediate domain transfer, while rental arrangements are made by assigning the customer’s DNS servers. The marketplace also advertises rentals with a guaranteed right to buy, giving customers an option to acquire a domain later. Listings display prices and, where provided, details such as domain age and search or popularity indicators. Buyers can contact the seller to ask questions or propose a different price, and the site provides a help section and online chat.