SITE.su is an online marketplace specializing in premium domain names, with a catalogue of more than 40,000 domains, primarily in the .ru, .su, and .рф zones. The service helps individuals and businesses find distinctive web addresses for websites, brands, and other online projects. Customers can browse available names, search by keywords or other criteria, and review listings with details such as purchase and rental prices, domain age, and selected rating or search statistics.

Domains are available for immediate purchase or monthly rental. The marketplace says purchases are completed online with immediate domain transfer, while rental involves assigning the customer’s DNS servers. Some rental arrangements include a guaranteed right to buy the domain later. Visitors can submit a question or offer a price for a listing, and can view or download the full domain catalogue, including an Excel list. SITE.su also provides a help section with contact options and online chat. Its services are designed to make discovering, evaluating, and securing relevant domain names straightforward.