SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains available in the .ru, .su, and .рф zones. The service helps businesses and individuals find web addresses built around keywords and relevant themes. Customers can purchase a domain online, with administration rights transferred immediately, or rent one by assigning their own name servers. Rental agreements include a priority right to buy the domain at a price fixed in the contract, and can run for up to 50 months.

The marketplace offers domain search tools, including filters and searches for matching or related names, and provides downloadable domain lists with metrics such as age and search-engine indicators. Buyers can view listed purchase and monthly rental prices, ask questions, or submit an offer to negotiate. Support is available through the Help section and online chat. SITE.su presents its inventory as a flexible resource for launching or developing websites and online projects, with both outright acquisition and rental options to suit different needs.