SITE.su is an online marketplace specializing in premium domain names, with a catalogue of more than 40,000 domains across the .ru, .su and .рф zones. The service enables individuals and businesses to find names for websites and projects through keyword, synonym, translation and transliteration searches, as well as an extended search by parameters. Listings show purchase and monthly rental prices, with additional information such as domain age and selected search and rating indicators.

Customers can buy domains online with immediate transfer or rent them by assigning their own DNS servers. Rental options include a guaranteed right to purchase, giving customers a route to ownership. The marketplace also supports instant checkout, account registration and sign-in, and enquiries about a specific domain or offers to negotiate its price. Visitors can browse or download the full domain list, including a spreadsheet export, and contact the service through its Help section, which provides contact details and online chat. SITE.su presents domain selection, comparison and acquisition in one place for customers seeking an online name.