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For the legislature term, see Quorum.
Quora, Inc.
Quora logo 2015.svg
Type Private
Founded June 2009 (2009-06)
Headquarters Mountain View, California
Area served Worldwide
Founder(s) Adam D'Angelo
Charlie Cheever
Key people Adam D'Angelo (CEO)
Slogan(s) The best answer to any question.
Website www.quora.com
Written in Python, C++[1]
Alexa rank Increase 93 (October 9, 2016)[2]
Type of site Question & answer
Registration Required
Available in English, Spanish
Launched June 21, 2010; 6 years ago (2010-06-21)
Current status Active

Quora is a question-and-answer site where questions are asked, answered, edited and organized by its community of users. Its publisher, Quora, Inc., is based in Mountain View, California. The company was founded in June 2009, and the website was made available to the public on June 21, 2010.[3] Users can collaborate by editing questions and suggesting edits to other users' answers.[4]


Quora was co-founded by two former Facebook employees, Adam D'Angelo and Charlie Cheever. D'Angelo resigned from his position at Facebook in January 2010 to create Quora.[5] He said that he and Cheever were inspired to create Quora because "we thought that Q & A is one of those areas on the internet where there are a lot of sites, but no one had come along and built something that was really good yet."[6] Quora's base of users grew quickly[clarification needed] in December 2010.[unreliable source?][7]

Quora had an estimated 500,000 registered users, as of January 2011.[8] In June 2011, Quora redesigned its website, in order to make information discovery and navigation easier. Some noted that the redesigned site had definite similarities to Wikipedia.[9] Quora released an official iPhone app on September 29, 2011, followed by an Android app on September 5, 2012.

In September 2012, Quora announced that co-founder Charlie Cheever was stepping back from a day-to-day role at the firm, although he would continue in an advisory role.[10]

In January 2013, Quora launched a blogging platform.[11]

Quora launched full text search of questions and answers on its website on March 20, 2013,[12] and extended the feature to mobile devices in late May 2013.[13] It also announced in May 2013 that all its metrics had tripled relative to the same time in the prior year.[14] In November, 2013, Quora introduced a feature called Stats to allow ll Quora users to see summary and detailed statistics regarding how many people had viewed, upvoted, followed, and shared their questions and answers.[15][16] TechCrunch reported that, although Quora had no immediate plans for monetization, they believed that search ads would likely be their eventual source of revenue.[17]

In April 2014, it was announced that Quora was raising $80 million from Tiger Global at a reported $900 million valuation.[18][19][20][21] Quora was also one of the members of the Summer 2014 Y Combinator batch.[22][23][24]

In March 2016, Quora acquired Parlio.[25] In April of that year, the company also began a limited rollout of advertising on the site.[26]


Quora requires users to register with their real names rather than an Internet pseudonym (screen name), and visitors unwilling to log in or use cookies have had to resort to workarounds to use the site.[27] Users may also log in with their Google or Facebook accounts using the OpenID protocol. They can upvote or downvote answers, and suggest edits to extant answers provided by other users. The Quora community includes some well-known people, such as Dustin Moskovitz, Jimmy Wales and Adrián Lamo.[8][28][29][30]

Quora has developed its own algorithm to rank answers, which works similarly to Google PageRank.[31] Quora uses Amazon Elastic Compute Cloud technology to host the servers that run its website.[32][33]


In March 2010, Quora received funding of $11 million from Benchmark Capital, valuing the start-up at $86 million.[34]

In May 2012, Quora raised $50 million in Series B funds, valuing the firm at over $400 million,[35][36] bringing their total funding to $61 million. Co-founder D'Angelo, who owns 0.8% of Facebook stock, also invested $20 million of his own money in the B round.[36]

In April 2014, Quora announced an $80 million Series C round of funding, valuing the firm at over $900 million. The funding was led by Tiger Global Management.[18][19][20][21]


Quora was reviewed extensively by the media in 2010.[37][38][39]

According to Robert Scoble, Quora succeeded in combining attributes of Twitter and Facebook.[40] Later, in 2011, Scoble criticized Quora for being a "horrid service for blogging," and although a decent question and answer website, not substantially better than competitors.[41]

In 2010, D'Angelo and Cheever were among five named "Smartest Engineer runner-up" in the "smartest people in the tech" article by CNNMoney.[42] They were also both listed in Inc. magazine's "Top 30 Under-30" entrepreneurs list of 2011.[43][44]

Privacy concerns[edit]

In August 2012, blogger Ivan Kirigin pointed out that it was possible for acquaintances and followers to see his activity including which questions he had looked at.[45] In response, Quora stopped showing question views in feeds later that month. By default, Quora exposes its users' profiles, including their real names, to search engines.[46]

Long-term posterity[edit]

Quora has attracted controversy for using robots.txt to forbid the Internet Archive's Wayback Machine from crawling the site.[47] Their stated reason is that the Wayback APIs as of 2016 do not give users a way to censor answers that they may regret previously posting. Critics have raised concerns about the fate of Quora's data if the site ever goes offline, and recommended Stack Overflow as an easily archived alternative.[48]

Top Writers Program[edit]

In November 2012, Quora introduced the Top Writers Program as a way to recognize individuals who had made especially valuable content contributions to the site, and encourage them to continue. Top writers are invited to occasional events and receive gifts such as branded clothing items and books. The company believes that, by cultivating a group of core users who are particularly invested in the site, the program creates a feedback loop of user engagement.[49]


Date Event type Details
June 2009 Product Quora founded
March 2010 Funding Quora raises $11 million in a series A, with Benchmark Capital as an investor[50]
June 2010 Product Quora announces that it will open up to the public[51]
January 2011 Team Marc Bodnick leaves Elevation Partners to join Quora[52]
February 2011 Technology Quora chooses C++ over C for its high performance services[53]
July 2011 Product Quora introduces video to its Q&A pages[54]
July 2011 Product Quora introduces Credits for asking-to-answer questions[55]
September 2011 Product Quora introduces threaded comments and comment voting[56]
May 2012 Funding Quora raises $50 million in a series B, with Peter Thiel and Adam D'Angelo as investors[50]
September 2012 Team Co-founder Charlie Cheever leaves[57]
November 2012 Product Quora introduces Top Writers program[58]
January 2013 Product Quora introduces blogs[11]
March 2013 Product Quora introduces a policy eliminating image-only answers. [59]
April 2014 Funding Quora raises $80 million in a series C at $900 million valuation, with Tiger Global Management and Y Combinator as investors[50][60]
January 2016 Product Quora announces bounty system, offering financial bounties for the best answer (selected by the user) on select questions.[61]
March 2016 Product Quora acquires Parlio, an online Q&A site started by Wael Ghonim.[62]
April 2016 Product Quora announces that it will start out testing advertisements, on a small number of question pages.[63]
May 2016 Team Marc Bodnick, Quora's public face and leader of its business and moderation team, announces that he is leaving the company.
August 2016 Product Quora announces the support for the Spanish language.[64]

See also[edit]


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  2. ^ "Quora.com Site Info". Alexa Internet. Retrieved 2016-09-07. 
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  8. ^ a b Arthur, Charles; Kiss, Jemima (5 January 2011). "Quora: the hottest question-and-answer website you've probably never heard of". The Guardian. London. Retrieved 31 May 2012. 
  9. ^ Tsotsis, Alexia (2011-06-24). "Inspired by Wikipedia, Quora aims for relevancy with topic groups and reorganized topic pages". techcrunch.com. Retrieved 2013-04-06. 
  10. ^ Cutler, Kim-Mai (2012-09-11). "Quora Co-Founder Charlie Cheever Steps Back From Day-To-Day Role At The Company". TechCrunch. 
  11. ^ a b Constine, Josh (2013-01-23). "Quora Launches Blogging Platform With Mobile Text Editor To Give Every Author A Built-In Audience". TechCrunch. Retrieved 2013-02-01. 
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  15. ^ Gannes, Liz (2013-11-12). "Quora Gives Its Writers a Stats Dashboard". AllThingsD. Retrieved 2013-11-14. 
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  23. ^ Altman, Sam (May 9, 2014). "Quora in the next YC batch". Y Combinator. Retrieved May 12, 2014. 
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  27. ^ Mlot, Stephanie (2013-02-15). "Quora adds options for sharing with unregistered users". PC Mag. Retrieved 2016-07-31. 
  28. ^ "Quora morphs from adolescence to hot property". linkedmediagroup.com. Retrieved 2013-04-06. 
  29. ^ Dishman, Lydia (2011-01-04). "fastcompany.com". fastcompany.com. Retrieved 2013-04-06. 
  30. ^ Taber, Jane (October 19, 2011). "Quora offers clues as to why Justin Trudeau won't yet seek Liberal helm — The Globe and Mail". The Globe and Mail. Toronto. 
  31. ^ "Quora's New Algorithm for Ranking Answers". ReadWriteWeb. Retrieved March 29, 2010. 
  32. ^ "Quora Signups". ReadWriteWeb. Retrieved March 29, 2010. 
  33. ^ Lohr, Steve (April 22, 2011). "Amazon Malfunction Raises Doubts About Cloud Computing". The New York Times. 
  34. ^ "Benchmark Invests at $86 Million Valuation". TechCrunch. Retrieved March 29, 2010. 
  35. ^ Raice, Shayndi (May 15, 2012). "Former Facebook Hands Capitalize on Buzz". Wall Street Journal. Retrieved July 17, 2012. Quora raised $50 million in a new financing that values it at $400 million, up from a valuation of around $86 million two years ago, said people familiar with the matter. The new financing round is led by Facebook board member Peter Thiel, who invested with his own personal funds , May 15, 2012
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  43. ^ "Top 30 Under 30, 2011". inc.com. 
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  50. ^ a b c "Quora". Https:. Retrieved July 1, 2015. 
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External links[edit]