SITE.su is an online marketplace for premium domain names, offering a selection of more than 39,000 to 40,000 domains across the .ru, .su and .рф zones. The service enables customers to purchase domains online or rent them, with rental agreements offering a guaranteed right to buy. Purchases are completed online with immediate domain transfer, while rental is arranged by assigning the customer’s DNS servers.

The marketplace provides tools to browse and search its listings, including expanded search by parameters, domains matching entered terms, transliterated names, and related or synonymous options. Customers can view a full domain list on the site or download listings as an Excel file, with details that may include price, rental cost, age and rating. Each listing presents purchase and monthly rental prices, and buyers can submit a question or propose an offer through the contact form. The site also provides help, registration and login options, and an online chat through its Help section, supporting customers as they compare domain names and choose a purchase or rental arrangement.