SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 listings across the .ru, .su, and .рф zones. It serves businesses and individuals seeking memorable, keyword-focused addresses for websites and online projects. Customers can purchase domains online for immediate transfer or rent them by assigning their own DNS servers. Rental options may include a guaranteed right to buy, giving customers flexibility before committing to ownership.

The marketplace offers domain browsing, advanced search by terms or parameters, and tools to view or download the full inventory, including domain metrics. Listings display purchase and monthly rental prices, with some also showing domain age, rating, and search statistics. Buyers can add a selected domain to a cart for a direct transaction, while those interested in negotiating can submit a question or price offer through the site. Help, contact information, and an online chat are available to support users. SITE.su focuses on making domain discovery, comparison, and acquisition straightforward, whether customers prefer immediate ownership or a lower-commitment rental arrangement.