Public;Subsidiary of Priceline.com
|Traded as||NASDAQ: KYAK|
|Headquarters||Norwalk, CT, USA|
|Founder(s)||Steve Hafner, Paul M. English|
|Key people||Steve Hafner
(Co-founder) & (CEO)
Paul M. English (technologist)
(Co-founder) & (CTO)
|Revenue||$224.5 million (2011)|
|Subsidiaries||SideStep, Swoodoo, Checkfelix.com|
|Available in||English (US, UK, India), Danish, Finnish, French, German, Italian, Norwegian, Spanish & Swedish|
|Launched||May 5, 2004
October 2004 (Public Beta) 
February 7, 2005 (2005-02-07) 
Kayak.com is a travel metasearch engine operated by the Kayak Software Corporation (or KAYAK). The company also provides related services and operates KAYAK.co.uk, checkfelix.com, and swoodoo.com. The company was acquired by Priceline.com on November 8, 2012.
The company was originally incorporated in Delaware in 2004 under the name Travel Search Company, Inc. The name was later changed to Kayak Software Corporation in August 2004.
In December 2007, KAYAK raised $196 million in a new round of financing from a group of investors, including General Catalyst Partners, Sequoia Capital, Accel Partners, and Oak Investment Partners. Using that funding, KAYAK acquired SideStep, a competing US travel website.
On March 5, 2010, KAYAK sold certain assets related to the website www.travelpost.com and its travel information business to The New Travelco, Inc., a Delaware corporation, which subsequently changed its name to Travelpost, Inc.
In May 2010, the swoodoo brand, a leading travel search platform in Germany, was acquired.
In January 2011, KAYAK closed down SideStep and redirected SideStep traffic to KAYAK.com.
In April 2011, KAYAK acquired all of the outstanding shares of JaBo Vertrieb-und Entwicklung GmbH, or JaBo Software. JaBo Software operates checkfelix.com, a leading travel metasearch website in Austria.
In July 2012 the company announced it would expand into Russia.
On July 20, 2012 Kayak officially went public, trading under the name KYAK. On its first day of trading, Kayak opened up at $26/ - higher than originally expected and closed at $33.18/share.
KAYAK was founded in 2004 by Steve Hafner and Paul M. English. Hafner currently serves as KAYAK’s chief executive officer, and English, the chief technology officer. Before KAYAK, Hafner helped found Orbitz in November 1999 and led its business development, advertising sales, marketing, and product marketing activities. Prior to his tenure at Orbitz, Hafner worked as a strategy consultant at the Boston Consulting Group, where he was part of the project team that led the development of Project T2, which eventually became Orbitz. Hafner received a BA in Economics from Dartmouth College and an MBA from the Kellogg Graduate School of Management at Northwestern University.
Prior to co-founding KAYAK, English co-founded Boston Light Software, a small business ecommerce platform that was sold to Intuit where he served as vice president of technology. English is noted in the press as having a passion for customer feedback as he launched www.gethuman.com to provide consumers tips on dealing with customer service phone systems. English is also a Director at Boston-based Partners-In-Health and Village Health Works, and is an advisor to JoinAfrica, FanSnap, Roost, LinkedIn, and Pixable. English holds a BS and MS in computer science from University of Massachusetts.
KAYAK.com compares airline, hotel, car rental, cruise, and other vacation deals from other travel sites including other fare aggregators. In August 2011, KAYAK updated its flight search to include Hacker Fares™ in the search results. Hacker Fares™ refers to itineraries that require purchasing two or more one-way tickets on separate airlines.
KAYAK.com offers trip management tools to store trip plans in one place, set alerts for price changes on specific flight routes or hotels over a certain timeframe, and keep track of reward program points.
KAYAK also makes available nonpersonal data from travel searches conducted on KAYAK to reveal sample trends on the relative popularity of flight routes and hotel destinations over specific periods of time.
At The Webby Awards, KAYAK has accepted the People’s Voice award in the travel website category in 2008, the Webby Award in the travel website category in 2009, the People’s Voice award in the mobile travel app category in 2011, and three more awards in 2012: both the Webby and People's Choice awards in the travel website category and the People's Voice award in the mobile travel app category.
In July 2010, Google announced the acquisition of ITA Software for $700 million in cash to pursue the creation of new flight search tools, subject to Department of Justice (DOJ) approval. KAYAK voiced concerns about monopoly power through FairSearch.org, a consortium that includes TripAdvisor, Travelocity, Expedia, and Microsoft, among others. After an investigation on April 8, 2011 the DOJ and Google agreed on the purchase subject to certain conditions and dismissed the potential antitrust lawsuit.
In December 2011 KAYAK announced that it would not renew a contract to advertise on the TLC reality television show All-American Muslim. The decision followed a campaign by the Florida Family Association, a one-man fundamentalist organization "on the Christian right" that says it's "defending American values." KAYAK chief marketing officer Robert Birge wrote that TLC "was not upfront with us about the nature of the show" which "sucked" in an explanation posted to the KAYAK website entitled "We Handled This Poorly."
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