SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 listings in the .ru, .su, and .рф zones. The service enables individuals and businesses to purchase domains or rent them for a monthly fee, offering a way to secure a suitable web address for a business or personal project. Purchases can be completed online, with domain administration rights transferred immediately. For rentals, customers assign their own DNS servers; rental agreements include a priority right to buy the domain at a price fixed in the contract. Agreements can last up to 50 months.

Visitors can browse the full domain inventory, download a list in Excel, or use advanced search to find names by keywords and other parameters. Listings show purchase and rental prices, domain age, and indicators related to search popularity and SEO appeal. Customers can submit questions or price offers through the site, and help and online chat are available in the support section.