SITE.su is an online marketplace for domain names, offering a catalog of more than 40,000 domains, including keyword-focused names in the .ru, .su, and .рф zones. The service helps businesses and individuals find a domain for a website, brand, or personal project, with listings searchable by name and related terms. Visitors can browse the full catalog, use advanced search, or download a domain list for review.

SITE.su offers both outright domain purchases and rentals. Purchases can be completed online, with immediate transfer of the domain, while rental arrangements allow customers to use a domain by assigning their DNS servers. The marketplace also advertises rentals with a guaranteed right to buy, giving customers an option to acquire a domain later. Listing details may include purchase and monthly rental prices, domain age, and search-related indicators. Customers can submit questions or make an offer on a specific domain, and the site provides help and online chat through its support section. The platform is designed to make discovering and securing suitable domain names straightforward.