SITE.su is an online marketplace specializing in premium domain names. It offers more than 40,000 domains, including keyword-based names in the .ru, .su, and .рф zones, for businesses and personal projects seeking an online address. Customers can browse the full inventory, search by words or other parameters, and download a domain list with traffic and SEO-related indicators.

Domains are available for immediate purchase or monthly rental. A purchase transfers the rights to administer the domain, while rental allows the customer to assign their own name servers. Rental agreements include a priority right to buy the domain during the agreement, with the purchase price fixed in the contract; agreements can run for up to 50 months. The site provides online ordering, account access, a contact form for questions or price offers, and help through its support section and online chat. Domain listings include details such as price, age, and search-related ratings, helping customers compare options.