SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains, including keyword-based names in the .ru, .su and .рф zones. Customers can browse listings, search by words or other parameters, view domain information and download a full catalog in Excel. The marketplace supports both immediate purchase and rental, with prices and details displayed for each domain.

A purchase transfers the rights to administer the domain, while rental lets the customer use it by assigning their own DNS servers. Rental agreements can include a priority right to buy the domain at a price fixed in the contract; agreements may run for up to 50 months. Buyers can complete online purchases with immediate domain transfer, and prospective customers may ask questions or propose a price through the site. SITE.su also provides help, account access and an online chat. Listings may include domain age and a rating based on search data and SEO-related indicators, helping customers compare names for business or personal projects.