SITE.su is an online marketplace specializing in premium domain names, offering more than 40,000 domains for businesses and other projects. Its listings include keyword-based names in the .ru, .su, and .рф zones, with options to buy or rent. Purchases are completed online with immediate transfer of domain administration rights. Rental gives customers the right to assign their own DNS servers and includes a contractual priority option to buy the domain during the rental term; the purchase price is fixed in the agreement. Rental is priced by calendar month, and contracts can run for up to 50 months.

Customers can browse the full domain list, download listings, or use advanced search to find names by terms and other parameters. Listings show purchase and monthly rental prices, domain age, and a rating based on search-related indicators. The site also provides contact forms, online chat, and help resources for questions or price proposals.