SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains offered across the .ru, .su, and .рф zones. Customers can browse listings, use expanded search options, or download the full domain catalogue for review. The marketplace supports both immediate purchase and rental, providing options for businesses, website creators, and personal projects seeking a suitable web address.

Purchases are completed online with transfer of domain administration rights. For rentals, customers can assign their own DNS servers, and agreements include priority purchase rights during the rental period, with the buyout price fixed in the contract. Rental prices are listed per calendar month, and agreements can run for up to 50 months. Site.su also invites customers to ask questions or propose a price for a domain, with contact options available through its help section and online chat.

Listings include details such as purchase and rental prices, domain age, and indicators of search interest and SEO appeal. The service focuses on making domain discovery, acquisition, and rental straightforward.