SITE.su is an online marketplace specializing in premium domain names, with more than 39,000 domains listed across the .ru, .su, and .рф zones. The service helps businesses, entrepreneurs, and project owners find web addresses suited to their names, themes, or search terms. Visitors can browse matching domains, translated terms, synonyms, and names beginning with selected keywords, or use advanced search to narrow results. Listings include pricing and may display details such as domain age and ratings.

Customers can purchase a domain online for immediate transfer or rent one by assigning their own DNS servers. Rental options may include a guaranteed right to buy the domain later. The marketplace provides tools to view or download the full domain list, including spreadsheet exports, and lets interested buyers ask questions or propose a price. Online chat and contact information are available in the help section. SITE.su presents domain acquisition and rental as flexible ways to secure a relevant online address for a business or personal project.