The site is accessible via and through Trinity Mirror's regional network of 200 local and hyperlocal websites, such as and
At launch, LocalMole.co.uk contains a database of over 1.8m business listings featuring business names, addresses, contact information and maps.
Users can search for businesses based on a range of criteria and can also rate and review their experiences.
Businesses will be able to enhance their listing with a microsite that offers customers more information including photographs, special offers and company information.
Various LocalMole.co.uk listings will also appear as text links across contextually relevant Trinity Mirror websites.
Chris Bunyan, digital director of Trinity Mirror Regionals, said: "Increasingly consumers turn to the internet as the place to find information on local businesses and services.
"By combining detailed business information with user ratings and reviews - supported by powerful online and in-paper promotion - we aim to develop LocalMole.co.uk into an indispensable service for local audiences and advertisers."
The site has been developed with business data provider Central Index and web design agency StormID.
It is being supported at launch by a major promotional campaign across Trinity Mirror's regional print and online media.