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 individuals and businesses find keyword-based domain names for websites, brands, and online projects. Visitors can browse the full inventory, search by words or categories, and use advanced filters to compare available names, including information such as age and popularity indicators.

Customers can purchase domains online, with ownership administration transferred promptly, or rent them by assigning their own DNS servers. Rental agreements include priority rights to buy the domain during the rental period, with the purchase price fixed in the contract. The catalog displays monthly rental and purchase prices, and customers can submit questions or propose an offer for a specific name. SITE.su also provides downloadable domain lists and support through its Help section, which includes contact information and online chat. By combining search tools, domain data, and flexible purchase or rental options, the marketplace serves customers seeking a suitable web address for their online presence.