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 supports both outright purchases and rentals, giving businesses and project owners flexible ways to secure a web address. Customers can buy domains online with immediate transfer or rent them by assigning their own DNS servers. Rental agreements also include a guaranteed right to purchase the domain.

The marketplace offers instant checkout, domain search by keywords and parameters, and tools to browse or download the full inventory, including a spreadsheet export. Listings display purchase and monthly rental prices, and may include information such as domain age, ratings, and search statistics. Buyers can submit questions or make an offer on a domain, with contacts and online chat available through the Help section. Registration and sign-in are provided for customers using the service. SITE.su presents its inventory as a way to find memorable, keyword-based domain names for businesses, websites, and personal projects.