SITE.su is an online marketplace for domain names, offering a catalog of more than 39,000 names across the .ru, .su, and .рф zones. The service enables customers to buy domains through an online process 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 purchase price set in the contract. Rental fees are presented by month, and agreements can last up to 50 months.

Customers can browse the full domain list, download a spreadsheet, or use advanced search to find names by keywords and other parameters. Listings may include details such as domain age, pricing, and search-related metrics. Visitors can add domains to a purchase or rental cart, sign in or register, and contact the marketplace through its help section or online chat. The site also provides a question form for inquiries or price offers. SITE.su serves people and businesses seeking domain names for websites and online projects.