SITE.su is an online marketplace for premium domain names, offering a catalog of tens of thousands of domains in the .ru, .su, and .рф zones. Its services are designed for individuals and businesses seeking a domain for a website, brand, or online project. Customers can purchase domains online with immediate transfer or rent them by assigning their own DNS servers. Rental options may include a guaranteed right to buy the domain later.

The marketplace provides search tools for finding names by keyword, language, or other parameters, along with listings that show prices, domain age, and available rating and search-statistic information. Customers can review purchase and monthly rental prices, browse the full catalog, or download a domain list in Excel format. For selected names, buyers can submit a question or propose a different price, and the site offers help and online chat through its support section. With both one-time purchases and rental arrangements, SITE.su provides flexible ways to secure a domain name.