SITE.su is an online marketplace for premium domain names, offering a catalogue of more than 40,000 domains in the .ru, .su and .рф zones. The service helps businesses and individuals find web addresses suited to their projects, with tools to search by keywords, explore a full domain list and filter results using advanced search. Available domains can be purchased online or rented, with immediate processing described by the marketplace.

Purchasing transfers the rights to administer a domain. Rental allows the customer to change its DNS server addresses and includes a contractual priority right to buy the domain during the rental term, at a price fixed in the agreement. Rental is priced monthly, and contracts can run for up to 50 months. Customers can review domain details, including age and search-related indicators, and contact the marketplace to ask questions or propose a price. SITE.su also provides a help section, online chat, contact options and downloadable domain listings.