SITE.su is an online marketplace for premium domain names, offering a selection of more than 40,000 domains across the .ru, .su, and .рф zones. Customers can browse available names, search by keyword or other parameters, view a full catalogue, and download domain listings in Excel. The service supports both immediate purchase and rental, with online transactions designed to make domains available without lengthy negotiation.

Purchasing transfers the rights to administer a domain, while rental allows the customer to set 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 run for up to 50 months. The marketplace displays details such as prices, domain age, and SEO-related ratings to help users compare options. Customers can also ask questions or propose a price through the site, with support and online chat available in the Help section. SITE.su serves individuals and businesses seeking memorable web addresses for their online projects.