SITE.su is an online marketplace specializing in premium domain names, offering more than 40,000 domains, including keyword-based names in the .ru, .su, and .рф zones. The service helps businesses and individuals find and secure domain names for their online projects through two options: immediate purchase or monthly rental. Purchases are completed online with immediate transfer of domain administration rights. Rental allows customers to assign their own DNS servers and includes a priority right to buy the domain during the rental term, with the purchase price fixed in the agreement. Rental contracts can run for up to 50 months.

Customers can browse the full domain catalogue, download a list for review, or use advanced search to find names by specific terms or criteria. Listings include information such as purchase and rental prices, domain age, and search-related indicators. SITE.su also provides a help section with contact details and online chat, and customers can ask questions or submit an offer for a domain.