SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains available across the .ru, .su and .рф extensions. The service helps businesses and individuals find memorable, keyword-focused domain names for websites, brands and other online projects. Customers can browse listings, search by words or themes, use advanced search filters, and view domains grouped by matches, synonyms, transliterations and initial letters. Each listing may include the purchase price, monthly rental price, domain age and available ranking or search statistics.

SITE.su offers two ways to secure a domain: immediate online purchase, with the domain transferred to the buyer, or rental, arranged by assigning the customer’s DNS servers. Some rentals include a guaranteed right to purchase the domain later. The marketplace also supports price discussions through an enquiry form, provides online help and chat, and lets visitors view or download the full domain inventory, including a spreadsheet option with domain metrics. Its catalogue includes Russian-language and Latin-script names for a wide range of potential uses.