SITE.su is an online marketplace specializing in premium domain names. The service offers a catalog of more than 40,000 domains, including keyword-based names in the .ru, .su, and .рф zones. Customers can browse available listings, search by one or more terms, use advanced search options, or download the full catalog for review.

The marketplace supports both domain purchases and rentals. Purchases are completed online, with domain administration rights transferred immediately. Rental customers can assign their own name servers, and rental agreements include a priority right to buy the domain during the agreement term, with the purchase price fixed in the contract. Rentals are priced per calendar month, and agreements can run for up to 50 months.

SITE.su provides listing details such as purchase and rental prices, domain age, and a rating based on search-related indicators. Visitors can contact the marketplace through its help section or online chat, ask questions about a domain, or submit a price offer.