SITE.su is an online marketplace specializing in premium domain names, including keyword-focused domains and websites in the .ru, .su, and .рф zones. The service presents a catalog of more than 39,000 domains, with options to browse the full inventory, search by keywords or other parameters, and download a domain list with available metrics.

Customers can purchase domains online, with administrative rights transferred immediately, or rent them 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 may last up to 50 months. Prices, domain age, and indicators related to search demand and SEO attractiveness are shown for listed names where available.

The platform also supports inquiries and price proposals through its contact form, and offers help, registration, sign-in, and online chat through its support section. SITE.su is designed for individuals and businesses seeking a domain for a website or an online project, with both direct purchase and flexible rental available.