SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains in the .ru, .su, and .рф zones. The service enables customers to browse, search, and compare domain names, including options based on keywords, and offers tools to view or download the full catalog.

Customers can purchase a domain online, with administration rights transferred immediately, or rent it by directing the domain to 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. The maximum rental term is 50 months. Listings provide information such as purchase and monthly rental prices, domain age, and SEO-related indicators.

SITE.su also offers an extended search, an online chat and help section, and a contact form for questions or price proposals. Its marketplace is designed for businesses and individuals seeking a domain for a website, online project, or marketing initiative.