SITE.su is an online marketplace for premium domain names, offering a catalog of more than 40,000 domains in the .ru, .su, and .рф zones. The service is designed for businesses and individuals seeking a memorable web address, with options to purchase a domain outright or rent it by the month. Purchases can be completed online with immediate domain transfer, while renting involves assigning the customer’s DNS servers. Rental agreements also include a guaranteed right to buy the domain.

Visitors can search by keywords and explore domains by matches, translations, synonyms, or transliterations. The site provides an advanced search, a complete domain list, and downloadable listings with metrics such as age and search or ranking indicators. For listed domains, customers can view purchase and rental prices and submit questions or price offers through the site; help and online chat are available in the support section. The marketplace presents instant checkout options for both buying and renting, alongside account registration and sign-in.