SITE.su is an online marketplace for buying and renting domain names, with a catalog of around 40,000 domains across the .ru, .su and .рф zones. The service is designed to help individuals and businesses find domain names that match keywords, topics or a particular project. Users can browse the full catalog, search by parameters, or download domain listings in Excel for review.

SITE.su offers instant online purchases, with domain administration rights transferred to the buyer, as well as monthly rentals. Rental agreements include a priority right to purchase the domain during the rental period, with the buyout price fixed in the agreement; rentals can last up to 50 months. Renting gives customers the right to set the domain’s name server addresses. The marketplace displays information such as price, registration age and search-related indicators to support evaluation. Customers can submit questions or price offers for individual domains, and the site provides assistance and online chat through its Help section.