SITE.su is an online marketplace for premium domain names, offering a catalog of more than 40,000 domains, primarily in the .ru, .su and .рф zones. The service helps businesses, website owners and other online project creators find domain names, including keyword-focused options. Customers can browse the full catalog, search by one or more terms, use advanced search filters, or download a domain list in Excel format.

Domains are available for immediate purchase or monthly rental. A purchase transfers the domain’s administrative rights online, while rental allows customers to assign their own name servers. Rental agreements include a priority right to buy the domain during the contract term, with the purchase price fixed in the agreement; the maximum rental period is 50 months. Listings display information such as price, domain age and an SEO-oriented rating based on search data. SITE.su also provides a help section, online chat and a contact form for questions or price offers.