SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains, including keyword-based names and websites in the .ru, .su, and .рф extensions. The service enables customers to purchase domains online with immediate transfer or rent them by assigning their own DNS servers. Rental plans can include a guaranteed right to buy the domain later, offering an alternative to an upfront purchase.

Visitors can browse the full domain list, download a spreadsheet, or use advanced search to find names by keyword and other parameters. Listings display purchase prices, monthly rental rates, and, for some domains, age and search-related statistics. Customers may also submit a question or propose a price through the site, with email and phone details required. The marketplace provides a help section and online chat for support, along with account registration and login. SITE.su presents domain acquisition and rental as flexible options for businesses and projects seeking a web address.