But with thousands of products, it can be hard to ascertain where the deals are.
We asked the team at DealNews to compile some products that are cheaper on Amazon.
Items that made the list include cell phones, movies and baby wipes.
In response to Amazon's low prices, Best Buy, Target, and Sears have enacted price-matching policies.
Matching prices is supposed to combat showrooming - the practice where shoppers test out products in stores and then buy them for cheaper online.
Disclosure: Jeff Bezos is an investor in Business Insider through his personal investment company Bezos Expeditions.