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 and project owners find descriptive, keyword-rich names, offering search by terms and parameters as well as browsing by matching names, synonyms, translations, and transliterations. Listings display purchase and monthly rental prices, along with available details such as domain age and search metrics.

Customers can buy domains online, with immediate transfer of domain administration rights, or rent them by assigning their own DNS servers. The marketplace also offers rentals with a guaranteed option to purchase, and buyers can contact the seller to ask questions or propose a price. Users can view or download the full domain list, including selected rating information, and access help, contact details, and online chat through the site. SITE.su presents domain acquisition and rental as flexible ways to secure a web address for a business or other online project, with a catalogue spanning a broad range of names and topics.