SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains offered across the .ru, .su, and .рф zones. The service helps businesses and individuals find memorable, keyword-focused web addresses for their online projects. Customers can browse the full catalogue, search by words or other parameters, review domain information, and download listings for offline consideration.

SITE.su offers both immediate online purchases and monthly rentals. A purchase transfers domain administration rights, while a rental lets the customer use their own DNS servers and includes a contractual priority right to buy the domain during the rental term at a price fixed in the agreement. Rental periods are priced by the calendar month, with agreements available for up to 50 months. The marketplace also provides a way to ask questions about a specific domain or submit a price offer. Contact options and online chat are available through the help section, supporting customers as they compare domains and choose a purchase or rental arrangement.