SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains for purchase or rental. Its listings include keyword-based domains in the .ru, .su, and .рф zones, with searchable options by name and other parameters. Customers can browse or download the full catalogue and review listing details such as price, age, and available search metrics.

The service supports online domain purchases with immediate transfer of administrative rights, as well as monthly rentals that allow customers to assign their own DNS servers. Rental agreements include a priority right to purchase the domain during the rental period, with the purchase price fixed in the contract; agreements can last up to 50 months. Customers can also submit questions or make an offer through the site, with contact details required. SITE.su presents domain acquisition and rental as accessible options for businesses and individuals seeking a suitable web address for an online presence or project.