SITE.su is an online marketplace for premium domain names, offering a catalogue of approximately 40,000 domains across the .ru, .su and .рф zones. Customers can browse available names, use an expanded search, view a complete domain list online or download it as an Excel file. The service supports both immediate purchases and monthly rentals, giving businesses and personal projects flexible ways to secure a web address.

Purchasing a domain transfers its administration rights to the buyer through an online process. Renting allows the customer to assign their own DNS servers, with contracts providing a priority right to purchase the domain during the rental period. The purchase price is fixed in the agreement, and rental contracts can run for up to 50 months. Listings show details such as purchase and rental prices, domain age and an SEO-oriented rating based on search data. Customers can contact the store through its help section or online chat, ask questions about a domain, or propose a price.