SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 39,000 listings across the .ru, .su, and .рф zones. The service helps businesses, entrepreneurs, and individuals find a domain suited to a website, brand, or project. Listings can be searched by keywords and other parameters, and customers can browse or download the full domain catalog.

Domains are available for immediate purchase or monthly rental. The marketplace describes purchases as online transactions with immediate domain transfer, while rentals are arranged by assigning the customer’s DNS servers and can include a guaranteed right to buy. Each listing displays its purchase and rental prices, with additional details such as domain age and selected rating or search statistics shown for some names.

Customers can use an online form to ask questions about a domain or propose a price; email and telephone details are required for inquiries. The site also offers account registration and login, along with a Help section that provides contact options and online chat.