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 businesses, entrepreneurs, and individuals find memorable, keyword-focused domain names for websites and online projects. Customers can purchase a domain online for immediate transfer or rent one, with rental arrangements offering a guaranteed right to buy. Domain rental is set up by assigning the customer’s DNS servers.

The marketplace provides several tools for browsing its inventory, including searches by word or topic, an advanced search with filters, and options to view or download the full domain list in Excel. Listings show purchase and monthly rental prices, and may also include domain age and search-related statistics. Customers can add a domain to a cart for immediate purchase or rental, or contact the seller to ask a question or propose a price. Help resources, contact details, and online chat are available through the site.