SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains across the .ru, .su, and .рф zones. Customers can browse available names, search by keyword or other parameters, view a complete domain list, or download the catalogue as an Excel file. Listings include purchase and monthly rental prices, with details such as domain age and search-related indicators also shown for some names.

The marketplace supports two ways to acquire a domain. Buyers can purchase online, with the domain transferred immediately, or rent it by arranging their own DNS servers. Rental agreements include a priority right to buy the domain during the contract period, with the purchase price fixed in the agreement; the stated maximum rental term is 50 months. Customers can also contact the seller to ask questions or propose a price. SITE.su provides account access, help information, and online chat for assistance. Its services are designed for businesses and individuals seeking domain names for websites, brands, or other online projects.