SITE.su is an online marketplace for premium domain names, offering a large catalog of keyword-based domains and websites in the .ru, .su, and .рф zones. Customers can browse available names, search by words or other parameters, and download a complete domain list for review. The service supports both immediate purchase and rental, making domain names accessible to businesses and project owners with different budgets.

Purchases are completed online, with domain administration rights transferred to the buyer. For rentals, customers can assign their own DNS servers and use the domain for a monthly fee. Rental agreements include a priority right to purchase the domain during the rental period, with the purchase price fixed in the contract; agreements can last up to 50 months. SITE.su also provides domain-specific enquiries and price offers, alongside help, contacts, and online chat. Listings display purchase and rental prices, domain age, and SEO-related indicators to help users compare options. The marketplace focuses on practical ways to secure memorable web addresses for online projects and businesses.