SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains available across the .ru, .su, and .рф zones. The service lets customers purchase a domain or rent it by assigning their own DNS servers. Purchases can be completed online with immediate transfer of domain administration rights, while rental agreements include a priority option to buy the domain at a price fixed in the contract. Rental is priced monthly and may continue for up to 50 months.

Customers can browse the full domain catalogue, download a list for review, or use advanced search to find names by keyword and other criteria. Listings show information such as purchase and rental prices, domain age, and an SEO-related rating based on search data. Buyers can also ask questions or propose a price through the site, with contact available via its help section and online chat. SITE.su serves businesses and individuals seeking memorable domain names for websites, brands, or other online projects, and offers both immediate transactions and a rental pathway.