SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains, primarily in the .ru, .su, and .рф zones. The service helps individuals and organizations find descriptive, memorable web addresses, with listings searchable by keywords, synonyms, transliterations, and other parameters. Customers can browse or download the full domain list and contact the marketplace to ask questions or make an offer.

SITE.su provides two options: immediate online purchase, with domain administration rights transferred to the buyer, and monthly rental. Rental agreements include a priority right to purchase the domain during the rental period, with the buyout price set in the contract; agreements can last up to 50 months. The site displays prices and available information about domain age and performance indicators, helping visitors compare options. An online help section, contact form, and chat are available for support. Through its searchable inventory and flexible purchase and rental arrangements, SITE.su serves customers seeking domain names for websites, businesses, and online projects.