SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains in the .ru, .su, and .рф extensions. The service enables customers to browse available names, search by keywords or other parameters, and purchase or rent domains online. Purchases are completed with transfer of domain administration rights, while rentals allow customers to use the domain by assigning their own DNS servers. Rental agreements include a priority right to buy the domain, with the purchase price fixed in the contract; rental terms can last up to 50 months.

The marketplace provides domain listings with purchase and monthly rental prices, alongside details such as registration age and search-related indicators. Customers can view or download the full domain catalog, including data in an Excel-friendly format, and contact the site through its help section or online chat. For individual listings, buyers can also submit a question or propose a price. SITE.su serves businesses and individuals seeking memorable domain names for websites and online projects.