SITE.su is an online marketplace for premium domain names, offering a selection of more than 40,000 domains, according to its website. Its listings focus on keyword-based names and cover the .ru, .su, and .рф domain zones. Customers can browse available domains, search by words or other parameters, view a full catalogue, and download domain lists with metrics such as age and search-related statistics.

The marketplace supports both immediate online purchases and monthly rentals. Purchased domains are transferred online, while rental customers can connect their own DNS servers. Some rental arrangements include a guaranteed right to buy the domain, giving customers an option to secure a name after renting it. Listings display purchase and rental prices, and visitors can contact the marketplace with questions or make an offer on a domain. Online chat and contact information are available through the help section. By combining searchable listings, domain data, flexible acquisition options, and direct enquiries, SITE.su serves businesses and individuals looking for web addresses for online projects.