SITE.su is an online marketplace for premium domain names, offering a catalogue of more than 40,000 domains for businesses, website creators, and personal projects. Its listings focus on the .ru, .su, and .рф extensions and include keyword-based names and existing websites. Customers can purchase a domain or rent it, with rental arrangements offering a guaranteed right to buy. Purchases are completed online with instant domain transfer, while renting involves assigning the customer’s DNS servers.

The marketplace provides tools to browse the full domain catalogue, search by words or multiple topics, and narrow results using extended search parameters. Visitors can also download a complete domain list in Excel, with details such as age and available ranking information. Listing pages show purchase and monthly rental prices, and customers can contact the seller to ask questions or propose a different price. SITE.su offers a help section with contact information and online chat, along with account registration and login for users managing their transactions.