Price comparison sites are services, which allow private individuals to view lists of prices from different retailer for the product they wish to buy. The central criterion required to match this business model is the free access to the comparison service from everywhere, i.e. without downloading a program. The price comparison website must however, not sell products itself. Yet, they can provide links to the resellers. Furthermore, the portal is non-interactive, which means that the prices need to be detected independently by the comparison service; neither the retailers nor by the users post the prices themselves. To be included in the business model definition the price comparison must not be restricted to only one product category or niche (e.g. only software or only books). Moreover, sub domains of general service provider (such as froogle or Yahoo! Shopping) are excluded from this definition. Neither do social shopping communities, live shopping websites or smack shopping services fall under this category. Furthermore, pure shopping directories or shopping guides are excepted from the business model definition.
| Rank | Company Name | Founders | Online Since | Country | Comments |
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| 1 |
AimLower.com |
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| 2 |
bottomdollar.com |
WebCentric, Inc. of Wichita, Kansas |
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| 3 |
resellerratings.com |
Scott Wainner | 1996-07-01 |
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| 4 |
bestwebbuys.com |
Steve Loyola | 1997-07-01 |
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| 5 |
pricescan.com |
David Cost, Jeffrey J. Trester | 1997-12-12 |
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| 6 |
pricepulse.com |
Larry O´Connor | 1998-01-07 |
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| 7 |
streetprices.com |
Stephen Heise | 1998-06-11 |
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| 8 |
PriceSaving.com |
eLi group | 1998-10-01 |
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| 9 |
mysimon.com |
Michael Yang | 1998-12-03 |
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| 10 |
bizrate.com |
Farhad Mohit | 1999-01-01 |
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| 11 |
PriceGrabber.com |
Tamim Mourad | 1999-03-01 |
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| 12 |
nextag.com |
1999-08-01 |
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| 13 |
guenstiger.de |
Torsten Schnoor | 1999-10-01 |
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| 14 |
price.com |
Larry O´Connor | 2000-02-29 |
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| 15 |
shoppingaisles.com |
2003-01-01 |
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| 16 |
compare123.com |
2003-12-15 |
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| 17 |
pricesaving.com |
2004-01-01 |
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| 18 |
SortPrice.com |
Asaf Klibanski, Doron Simovitch | 2004-05-01 |
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| 19 |
smarter.com |
Talmadge O'Neill, Harry Tsao | 2004-07-01 |
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| 20 |
pricerunner.com |
Martin Sundquist | 2005-04-01 |
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| 21 |
activeshopper.com |
Shelron Group Inc. | 2005-05-01 |
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| 22 |
become.com |
Michael Yang | 2005-06-01 |
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| 23 |
ShopLocal.com |
2006-01-01 |
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| 24 |
mpire.com |
Greg Harrison | 2006-06-01 |
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| 25 |
exava.com |
Become Inc. | 2007-08-01 |
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| 26 |
shopping.com |
Dr. Nahum Sharfman | 2008-09-29 |
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| 27 |
dealtime.com |
Dr. Nahum Sharfman | 2008-09-29 |
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| 28 |
techshopper.com |
Jim Newton | 2008-09-29 |
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| 29 |
calibex.com |
Nextag Inc. | 2008-09-29 |
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| 30 |
shopzilla.com |
Farhad Mohit, Henri Asseily | 2008-09-29 |
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