SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains in the .ru, .su, and .рф zones. The service enables individuals and businesses to find keyword-focused domains for websites, brands, and online projects, with listings searchable by terms and other parameters. Customers can browse the full catalogue, use an expanded search, or download a domain list in Excel for review.

SITE.su offers two ways to secure a domain: purchase it online for immediate transfer, or rent it by assigning the customer’s DNS servers. Rental agreements include a guaranteed right to buy, giving users the option to acquire the domain later. Listings display purchase and monthly rental prices, and may also include domain age and search or popularity indicators. For a listed domain, visitors can submit a question or propose a price through the site, with email and phone details required. The marketplace also provides registration and login access, along with help and online chat for customer inquiries.