SITE.su is an online marketplace for premium domain names, offering a catalogue of approximately 39,000 to 40,000 domains in the .ru, .su and .рф extensions. Its listings include keyword-focused names and domains in both Latin and Cyrillic scripts, with purchase prices and monthly rental rates displayed for individual options. Customers can buy a domain online, with the site describing the transfer as immediate, or rent one by assigning their own DNS servers. Some rental arrangements include a guaranteed right to purchase the domain later.

The marketplace provides tools to browse the full catalogue, download a domain list in Excel, and search using keywords or expanded criteria. Visitors can also contact the seller through an online chat or submit a question or price offer for a specific domain; email and phone details are required for enquiries. The featured brosili.ru listing, for example, is available for purchase or monthly rental. SITE.su presents these services for businesses and personal projects seeking a domain name for their online presence.