The 10 Best Shopping Engines

Here are the 10 best comparison shopping engines.

1. Google Shopping

More than 5 billion searches happen on Google every year. Many of those retail specific searches happen through Google Shopping, a cost per click program. Google Shopping is the top performer highest traffic and conversion rate shopping site for merchants online - consistently generating more clicks and sales for retailers.

2. Shopzilla

Shopzilla is a paid shopping site that highlights similar products from various retailers online. For merchants, Shopzilla features one of the easier bidding tools, and allows retailers to zero-bid, ($0.00) on poor-converting products.

As a Bizrate partner, Shopzilla merchants gain the benefit of Bizrate reviews – both on Shopzilla and Google. The third highest revenue producer among the shopping engines, Shopzila is a high converting converts at almost 4 percent. Shopzilla also supports bulk product feed uploads via an FTP.

3. PriceGrabber

PriceGrabber is a paid comparison shopping site which features deals, coupons, and weekly specials. PriceGrabber has a no-minimum CPC bidding model, which allows retailers to penny-bid, or bid as low as $0.01 on products.

PriceGrabber is second only to Google for its low Cost of Sale (15.52 percent), and is a leading shopping engine for click traffic. Merchants using PriceGrabber also have the added advantage of sending their product lists to Yahoo Shopping.

4. Amazon Product Ads

Amazon Product Ads (APA) are paid ads on , often found on product detail pages, search, buy boxes, and tower ads. Amazon Product Ads benefit from Amazon's Marketplace traffic and brand recognition. However, unlike the Amazon Marketplace, Amazon Product Ads links shoppers to a merchant's external web store for transactions, adding retargeting and branding value for retailers.

Amazon Product Ads are a viable option for retailers who already have listings on the Marketplace, or who want to list on Amazon without subscribing to the Marketplace program.

5. eBay Commerce Network

The eBay Commerce Network (formerly is a paid comparison shopping site. For retailers, the eBay Commerce Network CPC bidding model provides greater flexibility with category level bids.

For the second quarter in a row, the eBay Commerce generated the second highest traffic of all the shopping engines – in part because merchant listings on the eBay Commerce Network also receive exposure on Google Shopping.

6. Become

Become is an online shopping engine which aggregates research on products including expert reviews, consumer reviews, articles, buying guides, and forums. A smaller Shopping Engine, Become impressively beat out both Nextag and The Ebay Commerce Network with 18 percent COS.

7. Nextag

Nextag is a paid comparison shopping site that allows businesses to list physical products online- including tickets, real estate, and travel plans. Prior to Google Shopping, Nextag generated the highest revenue and conversions for paid Comparison Shopping Engines.

Although Nextag's surpasses the majority of the Shopping Engines with a 20.66 percent COS , the engine converts at almost 3 percent.

In addition to category and product level bidding Nextag's CPC bidding model allows merchants to bid at the brand level.

8. Bing Product Ads

Q1 2014 marks the last quarter for free Bing Shopping. Bing Product Ads are now available for online merchants, and work on a cost per click (CPC) basis, similar to Google Shopping. Bing Product ads appear on Bing search with product details and images.

9. Pronto

Pronto makes it easy for shoppers to find current sales and facilitates buying popular products (e.g., HDTVs) with buying guides. Pronto surpassed all but one Shopping Engine with almost 4 percent conversion rate during Q1.

10. GoSearchBuy

GoSearchBuy is a Comparison Shopping Engine for shoppers.It will revolutionize your online shopping experience!

GoSearchBuy collect product information, including pricing, from participating retailers(include Amazon, eBay) and then display that collective information on a single results page in response to a shopper's search query.