SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains available across the .ru, .su and .рф zones. The service helps businesses and individuals find a domain for a website, brand or personal project, offering searchable listings and tools to browse or download the full catalogue.

Customers can purchase domains online, with administration rights transferred immediately, or rent a domain by arranging for their own DNS servers to be assigned. Rental agreements include a priority right to buy the domain at a price fixed in the contract; rental terms can run for up to 50 months. Listings display prices and may include details such as domain age and search-related ratings. Buyers can also contact the marketplace to ask questions or propose a price. SITE.su provides a help section and online chat, along with search options for matching keywords and domain characteristics. Its offerings include both Latin-script and Cyrillic domain names, with purchase and rental prices varying by listing.