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, entrepreneurs and project owners find a domain suited to their name or topic, with search tools for keywords, transliterations and other criteria. Visitors can also view or download the full domain inventory.

Domains are offered for immediate purchase or monthly rental. Online purchases transfer domain administration rights, while renting lets customers use their own name servers. Rental agreements include a priority right to buy the domain during the rental period, with the purchase price fixed in the contract; agreements can last up to 50 months. Customers can explore listed prices, domain age and search-related indicators, place an order through the site, or contact the marketplace to ask a question or propose a price. SITE.su also provides help and online chat through its support section. The marketplace presents domain acquisition and rental as flexible options for establishing an online presence.