SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 listings across the .ru, .su, and .рф extensions. The service enables individuals and businesses to buy domains outright or rent them, including rental arrangements with a guaranteed option to purchase. Buyers can complete purchases online with immediate domain transfer, while rental customers use their own DNS servers.

The marketplace offers search tools for finding domains by keyword, related terms, or transliterations, and provides options to view or download the full inventory. Listings include purchase and monthly rental prices, alongside available details such as domain age and search-related statistics. Customers can add a domain to their cart for immediate purchase or rental, and can contact the seller to ask questions or propose a price. Support and online chat are available through the Help section.

SITE.su presents its inventory as a resource for securing memorable web addresses for business and personal projects.