SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains in the .ru, .su, and .рф zones. The service helps businesses and project owners find keyword-based domain names, browse available options, and compare purchase and rental prices. Customers can buy 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 purchase the domain during the rental period, with the buyout price fixed in the contract. Rentals are priced by calendar month and can last for up to 50 months.

The marketplace provides search tools for finding domains by words, themes, and other parameters, along with downloadable domain lists and information such as age and search-related ratings. Visitors can submit questions or price offers through the site, with contact options and online chat available in the Help section. SITE.su presents domain acquisition and rental as flexible options for establishing an online address.