SITE.su operates an online marketplace for premium domain names, offering more than 40,000 names across the .ru, .su, and .рф extensions. Customers can browse, search by keywords or other parameters, and review related domains, including translated and synonymous options. Listings display purchase and monthly rental prices, with additional information such as domain age and ratings where available.

The marketplace supports both immediate online purchases, with domain transfer, and rentals that assign the customer’s DNS servers. Some rental agreements include a guaranteed right to buy the domain later. Visitors can view or download the full domain list, including metrics, and contact the seller to ask questions or propose a price. Online chat and contact details are available in the help section.

SITE.su presents domain names for businesses and personal projects, with listings such as mouths.ru and related alternatives. Its service is focused on helping customers compare available names and choose between purchasing and renting, with transactions and inquiries handled through the website.