SITE.SU is an online marketplace specializing in premium domain names, with a catalogue of more than 39,000 domains, primarily in the .ru, .su, and .рф extensions. The service helps businesses and individuals find keyword-based domain names for websites, brands, and other online projects. Customers can browse listings, search by words or topics, use filters, or download the full catalogue for review.

Domains are available for immediate purchase or rental. The marketplace describes purchases as online transactions with immediate domain transfer, while rental involves assigning the customer’s DNS servers. Some rental arrangements include a guaranteed right to buy the domain later. Each listing displays its purchase and monthly rental price, and selected listings also include information such as domain age and ratings.

SITE.SU supports online ordering through listing controls and offers a contact form for questions or price proposals. Visitors can also access assistance and online chat through the Help section. Its services are designed to make discovering, comparing, and acquiring suitable domain names straightforward.