SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 names across the .ru, .su, and .рф zones. The service helps businesses and individuals find a suitable web address through keyword search, advanced filters, and listings of related or translated domains. Customers can browse the full catalog online or download a domain list for review.

Domains are available for immediate purchase or monthly rental. A purchase transfers the rights to administer the domain, while rental lets customers use their own DNS servers and includes a priority right to buy the domain during the contract period, at a price fixed in the agreement. Rental contracts can last up to 50 months. Each listing shows pricing and may include details such as domain age and indicators related to search demand and SEO potential. SITE.su also provides a help section, online chat, and a contact form for questions or price offers. Its marketplace is designed to make domain discovery, comparison, and acquisition straightforward.