SITE.su is an online marketplace for premium domain names, offering around 40,000 domains, including keyword-focused options in the .ru, .su, and .рф zones. Customers can browse listings, use advanced search, view domain statistics, or download the catalogue as an Excel file. The marketplace supports both immediate purchase and monthly rental, with pricing and information such as domain age and search-related ratings shown for individual listings.

Purchasing transfers the domain’s administration rights, while renting allows the customer to assign their own DNS servers. Rental agreements include a priority right to buy the domain during the rental term, with the purchase price fixed in the contract; agreements can last up to 50 months. Buyers and prospective renters can place orders online or contact the seller to ask questions and propose a price. SITE.su also provides help, account access, and online chat through its support section. Its service is designed for people seeking domain names for businesses, websites, blogs, or personal projects, with listings available in both Latin-character and Cyrillic forms.