UKBackorder is a UK domain backordering and auction platform that helps individuals and businesses acquire expiring domain names or sell domains they already own. Operating for over a decade, the service uses specialised software to monitor when domains become available and attempt to register them as soon as they drop. The company reports having caught tens of thousands of domains for clients and provides tools for users pursuing specific names, traffic-bearing domains, or additions to a domain portfolio.

Customers can place a backorder for a domain they want. If UKBackorder successfully secures it and there is only one backorder, the domain is allocated for a fixed price of £55. If several customers have placed backorders, the domain goes to a five-to-seven-day auction. Payment is due only after a successful catch or a winning bid, and unsuccessful attempts incur no fee. The platform also hosts auctions for domains offered by sellers, alongside searchable auction listings and 30-day drop lists with statistics.