SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains offered across the .ru, .su, and .рф zones. The service enables customers to buy domains online with immediate transfer of administration rights or rent them by assigning their own DNS servers. Rental agreements include a priority right to purchase the domain during the rental period, with the buyout price fixed in the contract; agreements can last up to 50 months.

Customers can browse the full domain inventory, download a spreadsheet of listings, or use advanced search to find names by keyword or other criteria. Each listing may show its purchase and monthly rental price, registration age, and SEO-related rating. The marketplace also provides a way to ask questions or propose a price, along with account access and online assistance through its Help section. SITE.su presents domain acquisition and rental as flexible options for businesses and personal projects seeking a suitable web address.