Dennis publishes technology titles such as Mac User and Computer Shopper and online magazine iGizmo.
Expertreviews.co.uk aims to provide a definitive online technology buying guide for the increasing number of shoppers who buy, research and compare technological products online. It has secured Toshiba as the first advertiser on the site.
Dennis' in-house team has designed and developed the site to enable users to find the products that match their needs, compare them with other products and take advice.
Users are also able read aggregated reviews from previous buyers of the product using buyer reviews provided by Reevoo to find the best price.
The reviews will be added to on a daily basis and products will include laptops, TVs, digital cameras and gadgets.
David Ludlow, Expert Reviews group editor, said: "Finding the right product at the right price can be incredibly difficult, but our filtering engine and huge database of in-depth reviews makes it easy."