SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains across the .ru, .su, and .рф extensions. The service helps businesses and individuals find keyword-based domain names for websites, brands, and online projects. Customers can browse the full catalog, search by words or other parameters, and download a list of available domains with details.

SITE.su offers both immediate domain purchases and monthly rentals. Purchases are completed online with prompt transfer of domain administration rights. Rental arrangements allow customers to use their own DNS servers and include a contractual priority right to buy the domain during the rental period, with the purchase price fixed in the agreement. Rental terms can last up to 50 months. The marketplace displays prices and selected information about domain age and search-related indicators, helping customers compare options. Users can also contact the service to ask questions or propose a price for a domain. SITE.su provides online support through its help section and chat.