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 service offers customers the choice of purchasing a domain or renting it, with online transactions designed for immediate completion. A purchase transfers the rights to administer the domain, while rental lets customers use their own DNS servers for a monthly fee. Rental agreements include a priority right to buy the domain during the contract term, with the purchase price fixed in advance; agreements can last up to 50 months.

Customers can browse or search the domain inventory, view details such as price, age, and SEO-related ratings, and download a full domain list in Excel format. The marketplace also provides an extended search, a contact form for questions or price offers, and online chat through its help section. SITE.su positions its services for businesses and personal projects seeking a suitable domain, whether through immediate acquisition or a flexible rental arrangement.