SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains listed across the .ru, .su and .рф zones. The service helps businesses, entrepreneurs and project owners find keyword-based domains, including names matched by terms, synonyms, translations and transliterations. Customers can purchase a domain online for immediate transfer or rent it by assigning their own DNS servers. Rental listings may include a guaranteed right to buy the domain later, offering an option for those who prefer to secure a name before committing to a purchase.

The marketplace provides search tools, a full domain list and downloadable listings, with information such as prices, domain age and selected performance indicators shown for many names. Buyers can add domains to a cart for purchase or rental, while those interested in negotiating can contact the seller with a question or offer. SITE.su also provides registration, login, help, contact information and online chat to support users through the process.