SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains, primarily in the .ru, .su, and .рф extensions. The service helps businesses, entrepreneurs, and other online projects find keyword-based domain names and purchase or rent them through the website. Buyers can complete an online purchase with an immediate transfer of domain administration rights. Rental allows customers to use a domain by assigning their own DNS servers and includes a priority right to buy it during the rental term, at a purchase price fixed in the agreement. Rental agreements can run for up to 50 months.

Customers can search by words or themes, use advanced search filters, browse the full domain list, or download listings with available metrics. Domain listings show purchase and monthly rental prices, age, and indicators related to search popularity and SEO potential. SITE.su also provides a help section, online chat, and a contact form for questions or price offers.