SITE.su is an online marketplace specializing in premium domain names, offering more than 40,000 domains across the .ru, .su, and .рф zones. Customers can search listings by keyword or other parameters, review domain details, and browse or download the full catalogue. The marketplace supports both outright purchases and monthly rentals, with prices and available information such as domain age and search-related ratings displayed for listings.

Purchases are completed online, with domain administration rights transferred immediately. For rentals, customers use their own DNS servers; rental agreements can provide a priority right to buy the domain during the rental period, with the purchase price fixed in the contract. Rental terms may run for up to 50 months. SITE.su also invites customers to ask questions or propose a price through its contact form, and provides assistance and an online chat through its Help section. By combining searchable listings, instant transactions, and flexible rental arrangements, the service helps individuals and businesses find domain names for websites and online projects.