SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains, primarily in the .ru, .su, and .рф zones. The service helps businesses and individuals find memorable, keyword-based web addresses for websites and online projects. Customers can browse available domains, search by words or other parameters, review a full listing, or download the inventory as an Excel file.

SITE.su offers both immediate purchase and rental. A purchase transfers domain administration rights to the buyer, while rental allows the customer to use their own name servers for a monthly fee. Rental agreements include a priority right to buy the domain, with the purchase price fixed in the contract; agreements may run for up to 50 months. The site displays pricing and, for listed domains, information such as age and search-related indicators. Customers can also ask questions or propose a price through the site, with help and online chat available in the support section. Overall, SITE.su provides flexible options for acquiring domain names.