SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 listings across the .ru, .su, and .рф zones. The service helps businesses and individuals find keyword-based domains for websites, brands, and personal projects. Customers can purchase a domain online with immediate transfer of administration rights or rent one by assigning 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 contract; agreements can run for up to 50 months.

The marketplace provides search tools for finding domains by keyword, including advanced search options, and offers full domain lists for viewing or downloading in Excel. Listings include purchase and monthly rental prices, along with details such as domain age and indicators of search visibility. Visitors can submit questions or propose a price for a domain, and the site offers contact information and online chat through its Help section. SITE.su presents domain selection, rental, and purchase in one place.