SITE.su is an online marketplace for buying and renting premium domain names, with a catalogue of more than 39,000 domains in the .ru, .su and .рф zones. The service helps businesses and individuals find domain names for websites, online projects and brand identities, offering search tools to browse by keyword, topic and other criteria. Visitors can view available domains, download a catalogue, and contact the team through the help section or online chat.

Customers can purchase domains online, with administration rights transferred immediately, or rent them by assigning their own DNS servers. Rental agreements include a priority right to buy the domain, with the purchase price fixed in the contract; rental terms can run for up to 50 months. Listings show purchase and monthly rental prices, alongside information such as domain age and an SEO-oriented rating based on search data. SITE.su also provides a question and price-proposal form, allowing prospective customers to enquire or negotiate about a particular domain.