SITE.su is an online marketplace specializing in premium domain names, with more than 39,000 listings advertised across the .ru, .su, and .рф extensions. The service enables customers to buy domain names online or rent them, including rental arrangements with a guaranteed right to purchase. Purchases are described as offering immediate domain transfer, while rentals use the customer’s DNS servers.

The marketplace provides tools to browse its full domain catalogue, search by keywords or other parameters, and download a complete listing in Excel. Customers can review available purchase prices and monthly rental rates, then use the shopping cart for an immediate transaction. For questions or price negotiations, the site offers an inquiry form and online chat through its help section.

Listings include keyword-based domains, such as dobryni.ru, alongside names in both Latin and Cyrillic scripts. The site also displays information such as domain age and selected ratings or search statistics. SITE.su is designed to help individuals and businesses find domain names for websites, online projects, or brand identities.