SITE.su is an online marketplace specializing in premium domain names, offering a catalog of more than 40,000 domains, primarily in the .ru, .su, and .рф zones. Customers can browse keyword-based names, search by words or themes, explore related options such as synonyms, translations, and transliterations, or use advanced search to find a suitable address. The marketplace lists prices and provides details such as domain age and selected search and rating metrics.

SITE.su offers both immediate online purchases and domain rentals, with rental agreements that include a guaranteed right to buy. According to the site, rental is arranged by assigning the customer’s DNS servers, while a completed purchase involves prompt domain transfer. Visitors can view or download the full domain list, including spreadsheet exports, and submit an offer or ask a question about a specific name. Support and online chat are available through the Help section, and customers can register or sign in to manage their activity.