SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains across the .ru, .su, and .рф zones. The service is designed for businesses and individuals looking for a domain for a website, brand, or personal project. Customers can browse available names, search by keyword or other parameters, and view a full domain list online or download it as an Excel file.

SITE.su offers both immediate purchases and rentals. A purchase transfers the rights to administer the domain, while rental allows the customer to use it by assigning their own DNS servers. Rental agreements include a priority right to buy the domain at a price fixed in the contract, and may last for up to 50 months. Listings show purchase and monthly rental prices, along with domain age and available rating information. Customers can submit a question or price offer for a domain, and the site provides help, contact details, and online chat. The marketplace emphasizes convenient online transactions and flexible access to domain names.