SITE.su is an online marketplace specializing in premium domain names, offering more than 40,000 options across the .ru, .su, and .рф zones. Customers can browse domains by keyword, explore transliterated and related names, and use advanced search tools to find options suited to a business or personal project. Listings include information such as purchase and rental prices, domain age, and search-related indicators.

The marketplace supports both immediate purchase and monthly rental. Purchases are completed online with transfer of domain administration rights, while rentals allow customers 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. SITE.su also provides a downloadable domain list, help resources, and a contact form for questions or price offers. Its services are designed for people seeking a memorable web address without limiting them to a single way of acquiring it.