SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains available across the .ru, .su, and .рф zones. The store helps businesses and individuals find names for websites, brands, and online projects, including keyword-based domains and names in Cyrillic or transliterated forms. Customers can browse the full inventory, search by terms or other parameters, and download domain listings in Excel format.

SITE.su offers both immediate domain purchases and rentals. A purchase transfers the rights to administer the domain, while rental allows the customer to use it by assigning their own DNS servers. Rental agreements include a priority right to buy the domain at a price fixed in the contract; agreements can run for up to 50 months. Listings show prices and may include domain age and search-related ratings. Customers can submit questions or price offers, with contact options and online chat available through the Help section. The service is designed to make domain selection, rental, and acquisition accessible through an online process.