SITE.su is an online marketplace specializing in premium domain names, with a catalogue of more than 40,000 domains across the .ru, .su and .рф zones. The service enables individuals and businesses to find keyword-based domain names and secure them through either an online purchase or monthly rental. Purchases involve the transfer of domain administration rights, while rentals allow customers to assign their own DNS servers. Rental agreements include a priority right to buy the domain at a price fixed in the contract, and can run for up to 50 months.

Visitors can browse the full domain list, download catalogue data, or use advanced search to find names by criteria and related words. Listings show purchase and rental prices, domain age and an SEO-oriented rating based on search statistics and indicators from Yandex and Google. Customers can submit questions or price offers through the site, with contact details required. SITE.su presents its marketplace as a practical resource for selecting memorable web addresses for businesses and online projects.