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 individuals and businesses find memorable web addresses for websites, brands, and other online projects. Visitors can browse available names, search by keywords or other criteria, view domain details, and download a complete domain list.

Customers can purchase domains online, with the site describing the process as an immediate transfer, or rent them by assigning their own DNS servers. Some rental options include a guaranteed right to buy the domain later. Listings show purchase prices, monthly rental rates, and, where available, age and audience or search-related indicators. The marketplace also provides a contact form for questions or price offers, along with a help section and online chat. SITE.su presents a range of names, from Latin-script keywords to Russian-language domains, and offers tools intended to make comparing and acquiring domain names straightforward.