SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains across the .ru, .su and .рф extensions. The service helps businesses, entrepreneurs and individuals find memorable web addresses suited to their projects, including names connected to specific topics or keywords.

Customers can purchase domains online, with transfer of administration rights, or rent them by assigning their own DNS servers. Rental is offered by the month and includes a contractual priority right to buy the domain during the rental period; the purchase price is fixed in the agreement. The marketplace also provides domain listings with purchase and rental prices, search tools for finding names by keywords and other criteria, and options to view or download the full catalog, including domain metrics.

Visitors can submit questions or price offers about individual domains, and the site provides a help section with contact information and online chat. SITE.su presents domain acquisition and rental as flexible ways to secure a suitable online address.