SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains, primarily in the .ru, .su, and .рф zones. Customers can browse a broad selection of keyword-based domains and search by terms, synonyms, translations, or transliterations, with filters available through an advanced search. The marketplace supports both outright purchases and rentals, and provides a full domain list for viewing or download.

Purchases are completed online, with domain administration rights transferred immediately. Rentals are priced by the calendar month and allow customers to assign 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 last up to 50 months. The site displays domain details such as price, age, and search-related indicators to help users compare options. Customers can ask questions or submit offers on individual domains, and the website provides help and online chat for assistance. SITE.su serves businesses and individuals seeking a memorable web address for an online project.