SITE.su is an online marketplace specializing in premium domain names, with a catalog of around 40,000 domains across the .ru, .su, and .рф extensions. The service helps individuals and businesses find keyword-based web addresses, including names related to specific industries and services. Customers can browse the full catalog, search by terms or parameters, review domain details, and download a list of available names.

Domains are offered for immediate purchase or monthly rental. Purchases are completed online with transfer of domain administration rights, while rental gives customers the right to change the domain’s name servers. Rental agreements include a priority right to buy the domain at a price fixed in the contract, and may last up to 50 months. The marketplace displays pricing and, for listed domains, information such as registration age and search-related indicators. Customers can also ask questions or suggest a price through the site, with help and online chat available in its support section.