SITE.su is an online marketplace for domain names, offering a catalogue of more than 40,000 domains, primarily in the .ru, .su and .рф zones. The service helps individuals and businesses find domain names for websites, brands and other online projects, with listings that include purchase and monthly rental prices. Customers can browse the full catalogue, search by keywords or use advanced search options to explore names by relevant terms and variations. Domain information may also include age and available rating or search data.

SITE.su supports immediate online purchases, with domains transferred to the buyer, as well as rentals set up by assigning the customer’s DNS servers. Some rental arrangements include a guaranteed right to buy the domain. Customers can submit questions or make an offer on a listing, and the site provides help and online chat through its support section. The complete domain list can be viewed online or downloaded as an Excel file, making it easier to compare available names.