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 helps businesses, entrepreneurs, and individuals find web addresses for their brands, projects, and online activities. Customers can browse the full domain inventory, search by keywords or other parameters, review listed prices and domain information, and download a complete catalog with metrics in Excel format.

Domains are available for immediate purchase or monthly rental. A purchase transfers the rights to administer the domain, while a rental lets the customer assign their own DNS servers. Rental agreements include a priority right to buy the domain during the rental period, with the purchase price fixed in the contract; agreements can last up to 50 months. Customers can buy or rent listed names online, ask questions, or submit a price offer through the site. SITE.su also provides account access and help, including contact options and online chat, to support customers exploring available domains.