SITE.su is an online marketplace for premium domain names, offering a large catalog of keyword-based domains and websites across the .ru, .su, and .рф extensions. The service is designed for businesses and individuals seeking a distinctive web address for a new or existing online project. Customers can purchase domains or rent them, with listings displaying prices and, where available, information such as domain age and search metrics.

Purchases can be completed online with instant domain transfer, while rentals are arranged by assigning the customer’s DNS servers. The marketplace also offers rental agreements with a guaranteed right to buy, providing an option to secure a domain before committing to ownership. Visitors can search by words or topics, use advanced search parameters, browse the full domain list, or download a catalog in Excel format. SITE.su provides a help section with contact details and online chat, and customers can submit questions or propose a price for an individual domain. The site presents resign.ru among its available listings.