SITE.su is an online marketplace for buying and renting domain names, with a catalog of more than 40,000 domains in the .ru, .su, and .рф zones. The service helps customers find keyword-based domain names through search tools, including an expanded search by criteria, and provides a downloadable catalog in Excel. Listings show purchase and monthly rental prices, domain age, and indicators related to search visibility.

Customers can buy a domain online, with administration rights transferred immediately, or rent it by arranging their own name servers. Rental agreements provide 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. The marketplace also invites customers to ask questions or propose a price for a listed domain, and offers assistance and online chat through its Help section. SITE.su presents its service as a straightforward way to explore, purchase, or rent domain names, including the option of renting with a guaranteed right to buy.