SITE.su is an online marketplace for premium domain names, offering customers a broad selection of keyword-based domains in the .ru, .su, and .рф zones. The service enables users to purchase domains outright or rent them, with listings available for immediate online transactions. A purchase transfers domain administration rights, while rental gives the customer the ability to assign their own DNS servers. Rental agreements include a priority right to buy the domain during the rental period, with the purchase price fixed in the agreement; contracts can last up to 50 months.

Customers can browse the full domain catalogue, download a list of available names, or use an advanced search to find options by their preferred criteria. Each listing may include purchase and monthly rental prices, domain age, and indicators of search-related potential. The site also provides a contact form for questions or price offers, along with help information and online chat. SITE.su presents itself as a marketplace with more than 40,000 domains available for purchase or rental.