SITE.su is an online marketplace specializing in premium domain names, with a catalog of approximately 40,000 domains across the .ru, .su, and .рф zones. The service helps individuals and businesses find domain names, including keyword-based options, and offers both immediate purchase and rental. Buyers can complete purchases online, with the domain transferred instantly, while rental is arranged by assigning the customer’s DNS servers. Some rental options include a guaranteed right to purchase the domain later.

Visitors can search by one or more words, explore domains with related meanings or transliterations, and use advanced search tools to narrow their choices. SITE.su also provides options to view or download the full domain list, including a spreadsheet export, and offers contact support and online chat through its Help section. Customers can submit questions or propose a price for a listed domain, with email and phone details required for inquiries. The marketplace presents purchase and monthly rental prices alongside available domain information to help customers compare options.