SITE.su is an online marketplace for premium domain names, offering a catalog of approximately 40,000 domains in the .ru, .su, and .рф zones. The service is designed for businesses and individuals seeking a suitable web address for an online project, with options to purchase a domain or rent it by the month.

Customers can browse the full domain list, download catalog data, or use an advanced search to find names by keyword and related terms. Listings display details such as purchase and rental prices, domain age, and available ranking or search statistics. The marketplace supports online purchases with immediate transfer of domain administration rights. Rental gives customers the right to change the domain’s name server settings, and the rental agreement includes a priority option to buy the domain at a price fixed in the contract. Agreements may last up to 50 months. Customers can contact the service through its help section or online chat, ask questions about a domain, or propose a price.