SITE.su is an online marketplace specializing in domain names, offering a catalogue of more than 40,000 domains across the .ru, .su, and .рф zones. The store enables customers to purchase a domain or rent it, with online purchasing and domain transfer handled immediately. Rental gives customers the ability to assign their own name servers and includes a contractual priority right to buy the domain during the rental period, at a price fixed in the agreement. Rental terms can run for up to 50 months.

Customers can browse the full domain list, download a spreadsheet, or use advanced search to find names by keyword and other parameters. Listings provide details such as purchase and monthly rental prices, domain age, and indicators of search interest and SEO attractiveness. The site also offers a question and offer form for discussing a specific domain or proposing a price. Help, contact information, and online chat are available through the support section, while account access supports registration and sign-in.