SITE.su is an online marketplace specializing in premium domain names for businesses and digital projects. Its catalog includes more than 40,000 domains, primarily in the .ru, .su, and .рф extensions, with options ranging from keyword-based names to domains in Cyrillic and transliterated forms. Customers can browse listings, search by terms or other parameters, view a full domain list, or download catalog information for review.

The marketplace offers both immediate online purchases and domain rentals. Rental arrangements are described as including a guaranteed right to buy, while purchased domains are transferred online. Listings display prices for purchase and monthly rental, and may also include details such as domain age and search-related indicators. Buyers can use the shopping cart for a direct transaction or contact the store to ask questions or propose a price. SITE.su also provides registration and login access, along with help, contact information, and online chat. Its services are designed to make finding, evaluating, renting, or acquiring a domain straightforward.