SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains available across the .ru, .su, and .рф extensions. The service helps businesses, entrepreneurs, and project owners find memorable keyword-based domains and acquire them either through an immediate online purchase or by renting. Purchases are completed online with instant domain transfer, while rental involves assigning the customer’s DNS servers; rental options may include a guaranteed right to buy the domain later.

Visitors can search by one or more words or topics, use advanced search filters, and browse related, synonymous, or translated domain suggestions. Listings provide details such as purchase and monthly rental prices, domain age, and available rating or search-statistics indicators. Customers can view or download the full domain inventory, including a spreadsheet option, and contact the marketplace through its help section or online chat. For a specific listing, users can also submit a question or propose a price. Registration and sign-in are available for customers who wish to proceed with transactions.