SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains, including keyword-based names in the .ru, .su, and .рф zones. Customers can browse listings, search by words or other parameters, view domain details, and download the full catalog as an Excel file.

The marketplace offers both outright purchases and monthly rentals. A purchase transfers domain administration rights to the buyer, while rental allows the customer to assign their own name servers. Rental agreements include priority rights to buy the domain during the rental term, with the purchase price fixed in the agreement; contracts can last up to 50 months. The site describes purchases and rentals as available online, with immediate transfer for purchases.

Listings show prices and may include information such as domain age and search-related indicators. Customers can contact the marketplace with questions or propose a price, and support is available through the Help section and online chat. SITE.su serves businesses and individuals seeking a domain for an online project.