SITE.su is an online marketplace for premium domain names, offering a catalog of more than 40,000 domains, including keyword-focused names in the .ru, .su, and .рф zones. Customers can purchase a domain or rent it, with online transactions designed for immediate processing. A purchase transfers domain administration rights, while rental gives the customer the right to change the domain’s name server settings. Rental agreements include a priority right to buy the domain during the rental period, with the purchase price fixed in the contract; agreements can last up to 50 months.

The marketplace provides domain search tools, including filtering by parameters, searches for matching names, and listings of transliterated alternatives. Visitors can view prices, domain age, and indicators of search interest and SEO appeal, as well as download the catalog for review. For domains without an immediate purchase or rental, customers can submit a question or offer a price. SITE.su also directs users to a help section with contact details and online chat, and provides account access for registration and sign-in.