SITE.su is an online marketplace for buying and renting domain names, offering a catalog of more than 40,000 names in the .ru, .su, and .рф zones. The service helps individuals and businesses find domains for websites, projects, or online ventures, with search tools for keywords and other criteria. Visitors can browse or download the full domain list, including data such as age and ratings, and contact the team with questions or a price offer.

Domains are available for immediate purchase or monthly rental. A purchase transfers domain administration rights, while rental allows the customer to assign their own DNS servers. Rental agreements include a priority right to buy the domain during the contract period, with the purchase price fixed in the agreement; contracts can last up to 50 months. Customers can complete purchases and rentals online, and the site provides help and online chat through its support section. SITE.su presents domain access as a flexible option, letting customers rent first or acquire a name outright.