SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 names available across the .ru, .su, and .рф extensions. The service offers both immediate online purchases and domain rentals, including rental arrangements with a guaranteed right to buy. For purchases, domains are transferred online; for rentals, customers assign their own DNS servers. Listings include keyword-based names, related terms, and transliterations, with details such as purchase and monthly rental prices, domain age, and ranking information where available.

Customers can search by one or several words, use advanced search options, browse the full inventory, or download a domain list in Excel format. The marketplace also provides a way to ask questions or propose a price for a specific name, alongside online chat and assistance through its Help section. Users can create an account, sign in, and place domains in a cart to begin a purchase or rental. SITE.su serves businesses and individuals seeking a relevant web address for a website, brand, or online project, offering a broad selection of domain names and flexible acquisition options.