SITE.su is an online marketplace specializing in premium domain names, offering more than 40,000 options in the .ru, .su, and .рф zones. Customers can browse domains by keyword, use advanced search, view domain details, and download the full catalog for review. The marketplace supports both outright purchases and monthly rentals, with listed information such as domain age and search-related ratings to help compare options.

Purchases are completed online with immediate transfer of domain administration rights. Rentals allow customers to assign their own DNS servers and include a priority right to buy the domain during the rental term, with the purchase price set in the agreement. Rental agreements may last up to 50 months. The site also provides an inquiry form for questions or price offers, along with help and online chat access. SITE.su serves businesses and individuals seeking a memorable web address for a company, project, or personal website, with domain listings and transaction options presented in a single online store.