FILE PHOTO: Amazon boxes are seen stacked for delivery in the Manhattan borough of New York City, January 29, 2016. REUTERS/Mike Segar/File Photo
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AMZN Amazon.Com

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Walmart is going after Amazon in a race to offer the lowest prices.

The brick-and-mortar retail giant has been on a shopping spree over the past year to ramp up its e-commerce business, acquiring Shoebuy, Moosejaw, Modcloth, and, most notably, Jet.com, for which it paid $3 billion last year.

Walmart, along with its subsidiary Jet, is taking direct aim at Amazon’s booming e-commerce dominance that’s putting many traditional retailers out of business.

All this competition, in theory, should be good news for shoppers.

But which online retailer is cheapest? To find out, we did a price check on 25 matching products on Amazon.com, Jet.com, and Walmart.com.

Amazon was the cheapest overall. The 25 products in total were $423.94 cheaper than on Jet and $161.05 cheaper than on Walmart.

Jet tended to have a price advantage with household products, while Amazon had generally cheaper higher-value items such as electronics. The biggest price difference, which significantly affected the totals, was for an LG smart HD TV.

Prices don’t include shipping fees, which vary across the sites. Walmart, Jet, and Amazon all offer free shipping on orders of more than $35.

Jet.com
Business Insider/Mary Hanbury

Here’s the price breakdown:

Heinz tomato ketchup squeeze bottle (32 ounces)

Heinz tomato ketchup squeeze bottle (32 ounces)
Jet.com

Jet: $3.17

Amazon: $2.88

Walmart: $2.88

Tostitos, original restaurant style (13 ounces)

Tostitos, original restaurant style (13 ounces)
Jet.com

Jet: $4.99

Amazon: $2.99

Walmart: $2.98

Oreo sandwich cookies, chocolate (14.3 ounces)

Oreo sandwich...