SITE.su is an online marketplace specializing in domain names, offering more than 40,000 listings across the .ru, .su and .рф zones. The service helps businesses, entrepreneurs and individuals find web addresses suited to a name, keyword or project. Customers can purchase domains online, with immediate transfer, or rent them for a monthly fee. Rental arrangements include a guaranteed right to buy, giving customers the option to secure a domain after renting it.

The marketplace provides search tools for exploring domains by word, topic and other parameters, including names that begin with or contain specific terms, transliterations and Russian-language equivalents. Visitors can browse the full inventory online or download a complete list in Excel format. Domain listings display purchase and rental options, with shopping-cart controls for placing an order. Customers can also ask questions or propose a price for a particular domain. Registration, sign-in, assistance, contact information and online chat are available through the site, supporting users as they compare options and complete a transaction.