SITE.su operates an online marketplace for premium domain names, offering more than 40,000 domains, including keyword-based names in the .ru, .su, and .рф zones. Customers can purchase a domain online with immediate transfer or rent one by directing their DNS servers to it. Rental options include a guaranteed right to buy, giving businesses flexibility before committing to ownership.

The marketplace provides tools to browse the full domain inventory, download listings, and search using keywords or advanced criteria. Domain pages display purchase and monthly rental prices, along with details such as age and available ranking or search statistics. Visitors can submit questions about a specific domain, propose a price, and contact the team through the help section and online chat. The site also offers account registration and sign-in for customers managing transactions.

SITE.su serves individuals and businesses seeking memorable web addresses, including names relevant to construction, architecture, property, and other sectors.