SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains across the .ru, .su, and .рф extensions. The service helps businesses and individuals find a memorable address for a website, brand, or online project, with listings that include keyword domains and related alternatives. Customers can browse the full catalogue, search by terms or other parameters, and review available domain information before choosing an option.

Domains are available for immediate online purchase, with transfer following purchase, or for monthly rental through assignment of the customer’s DNS servers. Some rental arrangements include a guaranteed right to buy the domain later. The catalogue displays purchase and rental prices, and selected listings also provide details such as domain age, ratings, and search statistics. Customers may contact the marketplace to ask questions or propose a price, and can access help and online chat through the support section. SITE.su also offers downloadable domain lists, including spreadsheet exports, to support browsing and comparison.