SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains available across the .ru, .su, and .рф zones. The service enables customers to purchase a domain online or rent one for a monthly fee, offering options for individuals and businesses seeking a suitable web address for a website or online project. Purchases are completed online with immediate transfer of domain administration rights. For rentals, customers can assign their own DNS servers, and agreements include priority rights to buy the domain during the rental period, with the purchase price fixed in the contract. Rental agreements can last up to 50 months.

The marketplace provides tools to browse the full domain inventory, search by keywords and other parameters, and download domain lists with available metrics. Listings show purchase and rental prices, domain age, and SEO-related indicators. Customers can also contact the team through the Help section or online chat, ask questions about a domain, and propose a price.