SITE.su is an online marketplace for premium domain names, offering buyers a choice of more than 40,000 domains, primarily in the .ru, .su and .рф zones. The service helps businesses and individuals find keyword-based domain names for websites, brands and personal projects. Customers can purchase a domain online, with administration rights transferred immediately, or rent one by assigning their own DNS servers. 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.

The marketplace provides tools to browse the full domain catalogue, download listings, and search by keywords or additional criteria. Individual domain pages show details such as purchase and monthly rental prices, registration age and search-related indicators. Customers can submit questions or price offers through the site, while help and online chat are available in its support section. SITE.su presents domain acquisition and rental as flexible options for establishing an online presence.