SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains in the .ru, .su, and .рф zones. The service helps businesses and individuals find a domain for a website, online project, or brand, with listings that include keyword-based names and domains in Cyrillic or transliterated forms. Customers can browse the full catalogue, download a domain list, or use advanced search to explore options and compare available information such as price, age, and search-related indicators.

Domains can be purchased online, with administration rights transferred immediately, or rented by the month through a change to the customer’s DNS servers. Rental agreements provide a priority right to buy the domain during the rental term, at a price fixed in the agreement; contracts can run for up to 50 months. Buyers and prospective renters can contact the marketplace to ask questions or make an offer, and the site provides help and online chat.