SITE.su is an online marketplace specializing in premium domain names, offering more than 40,000 domains, including keyword-based names in the .ru, .su, and .рф zones. Customers can browse listings, search by words or other parameters, view domain information, and download a complete catalog with metrics. The marketplace supports both immediate purchase and rental. Purchasing transfers domain administration rights, while rental allows customers to use the domain by assigning their own name servers. Rental agreements include priority rights to buy the domain at a price fixed in the contract, and can run for up to 50 months.

Listings show purchase and monthly rental prices, along with details such as domain age and SEO-related indicators. Customers can contact the marketplace through its help section or online chat, ask questions about a domain, or propose a price. The site also provides articles and reviews about domain names and their potential uses. SITE.su presents its service as a convenient way for businesses and individuals to find, rent, or acquire a memorable web address.