SITE.su is an online marketplace specializing in premium domain names, with a catalog of around 40,000 domains across the .ru, .su, and .рф zones. The service helps businesses and individuals find descriptive, keyword-focused names for websites, brands, and online projects. Customers can purchase a domain online, with immediate transfer, or rent one by assigning their own DNS servers. Rental options include a guaranteed right to buy the domain later.

The marketplace offers tools to browse the full catalog, download a domain list in Excel format, and search by keywords or more detailed criteria. Listings include purchase and monthly rental prices, and some provide additional information such as domain age and ratings. Visitors can also explore names related to a search through transliterations, synonyms, and translations, making it easier to compare alternatives. For questions about a specific name or to propose a price, customers can use the inquiry form; help and online chat are available through the site’s Help section.