SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains across the .ru, .su, and .рф zones. The service enables customers to purchase a domain or rent it, with online transactions and immediate transfer of administrative rights for completed purchases. Rental gives customers the right to use the domain by assigning their own name servers; rental agreements include a priority right to buy the domain at a price fixed in the contract. The stated maximum rental term is 50 months.

Customers can browse the full domain list, download listings in Excel, and use filters to search by relevant terms or other parameters. Listings may include purchase and monthly rental prices, domain age, and indicators related to search popularity and SEO attractiveness. The marketplace also provides a contact form for questions or price offers, along with help information and online chat. Its catalog includes gaishniki.ru and related domain names, with purchase and rental options shown for each listing.