SITE.su is an online marketplace for buying and renting domain names, with a catalog of more than 40,000 domains across the .ru, .su, and .рф zones. The service is designed for individuals and businesses seeking a domain for a website, brand, or online project. Customers can browse the full inventory, search by words or topics, use advanced search filters, and download a domain list in Excel format.

SITE.su offers immediate online purchases, with domain administration rights transferred to the buyer, as well as monthly rentals. Rental agreements provide tenants with priority rights to purchase the domain during the rental period, at a price fixed in the contract. Rentals can run for up to 50 months and allow customers to assign their own DNS servers. The marketplace also invites inquiries and price offers for individual domains. Support and online chat are available through its Help section, and listings include details such as purchase and rental prices, domain age, and SEO-related ratings.