SITE.SU is an online marketplace for premium domain names, offering a catalog of more than 39,000 domains, primarily in the .ru, .su, and .рф zones. The service is designed for individuals and businesses seeking domain names for websites, brands, or online projects. Customers can purchase a domain or rent it, with listings displaying prices for both options. The site describes purchases as online transactions with immediate domain transfer, while rental involves assigning the customer’s DNS servers. Some rental offers include a guaranteed right to buy the domain later.

Visitors can search for names using one or more keywords, browse related or synonymous domains, and use advanced search parameters. The marketplace also provides a full domain list for viewing or download, including a spreadsheet option with metrics such as tIC and PR. For specific listings, users can submit a question or propose a price; assistance and online chat are available through the Help section. Registration and login enable customers to use the site’s purchase and rental functions.