SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains across the .ru, .su, and .рф zones. The service helps businesses and individuals find a name for a website, brand, or online project, offering both immediate purchase and rental options. Buyers can complete a purchase online, with domain administration rights transferred after the transaction. Rental provides the right to use a domain by assigning the renter’s DNS servers; agreements include priority rights to purchase the domain, with the buyout price fixed in the contract. Rental agreements can last for up to 50 months.

Customers can search by keywords or use advanced search options, view matching domains, and download the full catalog as an Excel file. The marketplace also provides domain information such as age and SEO-related ratings. For selected domains, visitors can submit a question or propose a price. Help resources and an online chat are available through the support section, while shopping-cart options make it possible to initiate a purchase or rental directly.