SITE.su is an online marketplace for buying and renting domain names, with a catalog of more than 40,000 listings, primarily in the .ru, .su, and .рф zones. The service helps individuals and businesses find web addresses that match keywords, themes, translations, or transliterations, and provides search tools to explore available options. Listings include purchase prices and monthly rental rates, with additional information such as domain age and selected traffic or search indicators.

Customers can complete eligible purchases online, with the domain transferred immediately, or rent a domain by assigning their own DNS servers. The marketplace also offers rentals with a guaranteed right to buy, giving customers a way to use a name before purchasing it. Users can browse or download the full domain list, use advanced search, and contact the seller through an online chat or inquiry form to ask questions or propose a price. SITE.su presents its service as a straightforward way to secure a memorable domain for a website, business, or personal online project.