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 and online projects, with search tools for exploring listings by term, topic, and other criteria. Customers can browse or download the full domain catalogue, review available details such as age and search-related indicators, and contact the marketplace to ask questions or propose a price.

Domains are available for immediate purchase or monthly rental. Purchases are completed online with transfer of domain administration rights, while rental allows customers to assign their own DNS servers. Rental agreements include a priority right to buy the domain at a price fixed in the contract; agreements can last up to 50 months. SITE.su also provides account access and customer support through its Help section, including contacts and online chat. By combining a large searchable inventory with flexible purchasing and rental options, the marketplace serves customers seeking established or descriptive domain names for their online presence.