SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains available in the .ru, .su, and .рф zones. The service helps individuals and businesses find keyword-focused domain names for websites and online projects. Customers can browse the full inventory, search by words or other parameters, review domain information, and download a list of listings.

SITE.su offers both immediate purchase and monthly rental. A purchase transfers domain administration rights, while rental allows customers to use the domain by assigning their own name servers. Rental agreements include a priority right to buy the domain during the agreement, with the purchase price set in advance; the maximum rental term is 50 months. The site also provides a contact form for questions or price offers, along with help and online chat. Listings include purchase and rental prices and may show domain age and search-related indicators. The marketplace presents its service as a practical way to secure a relevant web address, with options suited to different budgets and plans.