SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains offered for purchase or rent. Its listings focus on the .ru, .su, and .рф zones and include keyword-based names, transliterations, and related domain options. Customers can browse available names, search by words or other parameters, view listing details, and download a complete domain list in Excel format.

The marketplace supports online purchases with immediate transfer of domain administration rights. Renting is also available, with the customer able to set the domain’s name server addresses. Rental agreements include priority rights to buy the domain during the rental period, at a purchase price fixed in the agreement; the stated maximum agreement term is 50 months. The site displays prices and may provide information such as domain age and search-related ratings. Prospective buyers or renters can submit questions or offers for a domain, while contact information and online chat are available through the help section.