SITE.su is an online marketplace for premium domain names, offering a catalog of more than 40,000 domains, primarily in the .ru, .su, and .рф zones. The service helps businesses and individuals find memorable, keyword-focused domain names for websites, brands, and online projects. Customers can purchase domains online with immediate transfer or rent them by assigning their own DNS servers. Rental options include a guaranteed right to buy, giving customers a path from temporary use to ownership.

The marketplace provides search tools to find domains by keyword, synonyms, transliterations, and other criteria. Users can browse the full catalog, download a domain list in Excel, review available purchase and monthly rental prices, and submit questions or price offers through the site. Registration and account access are also available, alongside help information and online chat. Listings cover a wide range of Russian-language names and related spellings, with some entries showing age and rating data. SITE.su is focused on making domain selection and acquisition straightforward through self-service search and online purchasing and rental processes.