SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains available across the .ru, .su, and .рф zones. The service helps businesses and online project owners find relevant keyword-based domains, including names, synonyms, and transliterations. Customers can browse listings, use advanced search filters, view domain details and SEO-related indicators, or download the full inventory as an Excel file.

Domains are available for immediate purchase or monthly rental. A purchase transfers administration rights to the buyer, while renting allows the customer to assign their own DNS servers. Rental agreements include a priority right to buy the domain at a price fixed in the contract, and may run for up to 50 months. The site also enables customers to submit questions or price offers for individual domains and provides contact information and online chat through its help section. With searchable listings and flexible acquisition options, SITE.su offers a straightforward way to secure a domain for a business or web project.