SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains listed across the .ru, .su, and .рф zones. The service enables customers to purchase a domain or rent it by the month, with rental agreements providing a priority right to buy at a price fixed in the contract. Renting works by allowing customers to assign their own DNS servers, while completed purchases include online transfer of domain administration rights.

Visitors can browse the full domain catalogue, download listings, or use advanced search to find names by keyword and other parameters. Listings show purchase and monthly rental prices, along with details such as domain age and indicators of search popularity and SEO appeal. Customers may also contact the marketplace to ask questions or propose a price, with assistance and online chat available through the Help section. SITE.su serves businesses, developers, and individuals seeking a memorable web address for an online project, offering both immediate purchase and flexible rental options, including the opportunity to acquire a domain later.