SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains, primarily in the .ru, .su, and .рф zones. The service helps individuals and businesses find web addresses suited to their names, keywords, or project topics. Customers can browse the full domain list, download a catalog, or use advanced search to explore available options and compare listed prices and details.

Domains can be acquired through an online purchase or rented by assigning the customer’s DNS servers. The site describes purchases as offering immediate domain transfer and also provides rental arrangements with a guaranteed right to buy. Listings show purchase prices and monthly rental rates, and some include information such as domain age and search or rating statistics. Interested customers can submit questions or propose a price through the website, with email and telephone details required for inquiries. SITE.su also provides account access and a help section with contact options and online chat.