SITE.su is an online marketplace specializing in premium domain names, offering more than 40,000 domains in the .ru, .su and .рф zones. The service enables customers to browse listings, search by keywords or other criteria, and view a downloadable catalogue. Domains can be purchased online with immediate transfer of administration rights or rented for a monthly fee. Rental agreements include a priority right to buy the domain during the rental period, and customers can contact the marketplace to ask questions or propose a price.

The catalogue includes keyword-based names, such as domains related to pharmacies and healthcare, alongside translated, transliterated and synonymous options. Each listing may show its purchase and rental prices, age and available rating or search statistics. SITE.su also provides account access, help information and online chat. Its offering is designed for businesses and project owners seeking a relevant domain without limiting them to an outright purchase. For example, aptechky.ru is listed for purchase or monthly rental, with the terms displayed on the site.