SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains across the .ru, .su, and .рф extensions. Customers can browse available names, search by one or more keywords, use advanced search options, and view or download domain listings. The marketplace supports both immediate purchases and rentals, giving businesses and individuals flexible ways to secure a domain that suits their needs.

A purchase transfers the rights to administer the domain, with online transactions described as providing immediate transfer. For rentals, customers can assign their own DNS servers and pay a monthly fee. Rental agreements include a priority right to purchase the domain during the rental period, with the buyout price fixed in the contract; agreements can last up to 50 months. SITE.su also provides a contact form for questions or price offers, along with help information and online chat. Domain listings may include details such as age, price, and SEO-related indicators to help visitors compare options.