SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains available across the .ru, .su, and .рф extensions. The service helps businesses and individuals find keyword-focused domains for websites, brands, and online projects. Customers can purchase a domain online, with administrative rights transferred after purchase, or rent one on a monthly basis. Rental agreements include a priority right to buy the domain during the rental period, with the purchase price fixed in the contract; agreements can last up to 50 months. Renting allows customers to assign their own name servers.

The marketplace offers domain search by keyword and provides tools to browse or download the full inventory, including listings with details such as asking price, rental cost, domain age, and search-related indicators. Customers can submit questions or price offers through the site, and assistance is available through its Help section and online chat. SITE.su presents domain names as practical digital assets for building a recognizable online presence, while offering flexible routes to acquire or use them.