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For the legislature term, see Quorum.
Quora, Inc.
Quora logo 2015.svg
Type of business Private
Type of site
Question & answer
Available in English, Spanish
Founded June 2009; 7 years ago (2009-06)
Headquarters Mountain View, California
Area served Worldwide
Founder(s) Adam D'Angelo
Charlie Cheever
Key people Adam D'Angelo (CEO)
Kelly Battles (CFO)[1]
Slogan(s) The best answer to any question.
Website www.quora.com
Alexa rank Decrease 159 (February 2017)[2]
Registration Required
Launched June 21, 2010; 6 years ago (2010-06-21)
Current status Active
Written in Python, C++[3]

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.[4] Users can collaborate by editing questions and suggesting edits to other users' answers.[5]


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.[6] 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."[7] Quora's base of users grew quickly[clarification needed] in December 2010.[unreliable source?][8]

Quora claimed to have 100 million monthly unique visitors, as of March 2016.[9] In June 2011, Quora redesigned its website, in order to make information discovery and navigation easier.[10] 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.[11]

In January 2013, Quora launched a blogging platform.[12]

Quora launched full text search of questions and answers on its website on March 20, 2013,[13] and extended the feature to mobile devices in late May 2013.[14] It also announced in May 2013 that all its metrics had tripled relative to the same time in the prior year.[15] 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.[16][17] TechCrunch reported that, although Quora had no immediate plans for monetization, they believed that search ads would likely be their eventual source of revenue.[18]

In April 2014, it was announced that Quora was raising $80 million from Tiger Global at a reported $900 million valuation.[19][20][21][22] Quora was also one of the members of the Summer 2014 Y Combinator batch.[23][24][25]

In March 2016, Quora acquired Parlio online community website.[26] In April of that year, the company also began a limited rollout of advertising on the site.[27]

In October 2016, Quora launched Quora en español to the public.[28] Following this announcement in early 2017, a beta of Quora in French was announced.[29]


Quora requires users to register with their real names rather than an Internet pseudonym (screen name);[30] although verification of names is not required, false names can be reported by the community. This was done with the ostensible intent of adding credibility to answers, but Quora also has thousands of anonymous answers with thousands of upvotes. Visitors unwilling to log in or use cookies have had to resort to workarounds to use the site.[31] 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 Jimmy Wales and Adrián Lamo.[32][33][34][35]

Quora has developed its own algorithm to rank answers, which works similarly to Google PageRank.[36] Quora uses Amazon Elastic Compute Cloud technology to host the servers that run its website.[37][38]

Currently, Quora has different ways to recommend questions to users[39]

  • Home feed questions recommendations : In this method each user will have a timeline that is personalized to their preferences. Quora also provide "interesting" questions that are relevant to the user's preferences. This will lead to the user to either answer that questions or refers another user to better answer it.
  • Daily Digest: In this method, Quora sends a daily email containing a set of questions with one answer that is deemed the best answer given a certain ranking requirements.
  • Related Questions: In this method, Whether the user is logged in or not, a set of questions that relates to the current questions will be recommended and displayed on the side. This will help the user navigate through the questions and find what is more relevant to their preference.
  • Ask to Answer: This feature enables the user to recommend another user that they see is fit or better suited to answer that question.

In March 2010, Quora received funding of $11 million from Benchmark Capital, valuing the start-up at $86 million.[40]

In May 2012, Quora raised $50 million in Series B funds, valuing the firm at over $400 million,[41][42] 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.[42]

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.[19][20][21][22]


Quora was reviewed extensively by the media in 2010.[43][44][45]

According to Robert Scoble, Quora succeeded in combining attributes of Twitter and Facebook.[46] 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.[47]

As of February 2017, according to Alexa, largest user base of Quora comes from US at 37.9%, followed by India at 15.8%.[48]

Content Moderation

Quora supports various features to moderate content posted by users. Majority of content moderation is done by the users.

  • Upvote/Downvote is a feature where users can rank answers based on how relevant or helpful they found the answers to be. This feature helps maintain the quality of content posted online [49]. The more Upvotes an article receives, the higher it is ranked and thus shows up on top of the searches related to the question.
  • Report Answer is another feature where users can report plagiarism, harassment, spam, factually incorrect articles, etc. This keeps sub-standard content under check.
  • Suggest Edits features lets users make suggestions to improve an article by allowing them to make changes to an article. These are also made visible to the person who originally wrote the answer.

Anonymity concerns

Quora allows users to create user profiles where they can add their real names, photo, topics to follow, number of followers, questions answered by them, etc. Users can chose to keep these settings private. Each user with a user profile has access to activity feed which has topics of interests to the user. The feed is displayed on the home page and helps organize content in a chronological order.

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.[50] 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.[51]

In contrast with other major information sites, Quora does place restrictions on anonymity. Quora allows questions and answers to be posted anonymously, but it does not allow anonymous comments to be posted as direct responses to answers. Anonymous users can no longer upvote, comment, merge questions, suggest edits, or send answer requests [52]. This new restriction was enacted to suppress an unspecified number of negative anonymous comments. Although other sites, such as Wikipedia and Stack Exchange, use crowdsourcing to identify, collapse, and filter out undesirable content, Quora has yet to implement such a system.

Recent controversy involving the restriction of the Internet Archive's Wayback Machine stems, at least to some degree, from Quora's requirement that its question and answer site enforce some type of identity validation. Citing possible user remorse over previously posted content, the Wayback Machine was banned entirely from crawling Quora.


Quora has attracted controversy for using robots.txt to forbid the Internet Archive's Wayback Machine from crawling the site.[53] 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.[54]

Top Writers Program

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.[55] Many Quora employees are awarded Top Writer Status essentially by default.citation needed


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[56]
June 2010 Product Quora announces that it will open up to the public[57]
January 2011 Team Marc Bodnick leaves Elevation Partners to join Quora[58]
February 2011 Technology Quora chooses C++ over C for its high performance services[59]
July 2011 Product Quora introduces video to its Q&A pages[60]
July 2011 Product Quora introduces Credits for asking-to-answer questions[61]
September 2011 Product Quora introduces threaded comments and comment voting[62]
May 2012 Funding Quora raises $50 million in a series B, with Peter Thiel and Adam D'Angelo as investors[56]
September 2012 Team Co-founder Charlie Cheever leaves[63]
November 2012 Product Quora introduces Top Writers program[64]
January 2013 Product Quora introduces blogs[12]
March 2013 Product Quora introduces a policy eliminating image-only answers.[65]
April 2014 Funding Quora raises $80 million in a series C at $900 million valuation, with Tiger Global Management and Y Combinator as investors[56][66]
January 2016 Product Quora announces bounty system, offering financial bounties for the best answer (selected by the question asker) on select questions.[67]
March 2016 Product Quora acquires Parlio, an online Q&A site started by Wael Ghonim.[68]
April 2016 Product Quora announces that it will start out testing advertisements, on a small number of question pages.[69]
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 support for the Spanish language.[70]
November 2016 Team Kelly Battles announced as new chief financial officer (CFO).[1][71]

See also


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  2. ^ "Quora.com Site Info". Alexa Internet. Retrieved February 16, 2017. 
  3. ^ "Why did Quora choose C++ over C for its high performance services? - Quora". Quora. Retrieved February 12, 2011. 
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  5. ^ Wortham, Jenna (March 12, 2010). "Facebook Helps Social Start-Ups Gain Users". New York Times. Retrieved March 29, 2010. 
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  8. ^ Lewenstein, ed. (November 28, 2010). "Quora Signups Explode". Retrieved January 24, 2011. 
  9. ^ "How many people use Quora?". 
  10. ^ Tsotsis, Alexia (June 24, 2011). "Inspired by Wikipedia, Quora aims for relevancy with topic groups and reorganized topic pages". techcrunch.com. Retrieved April 6, 2013. 
  11. ^ Cutler, Kim-Mai (September 11, 2012). "Quora Co-Founder Charlie Cheever Steps Back From Day-To-Day Role At The Company". TechCrunch. 
  12. ^ a b Constine, Josh (January 23, 2013). "Quora Launches Blogging Platform With Mobile Text Editor To Give Every Author A Built-In Audience". TechCrunch. Retrieved February 1, 2013. 
  13. ^ Russell, Jon (March 21, 2013). "Quora finally introduces full-text search to boost content discovery". The Next Web. Retrieved November 14, 2013. 
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  15. ^ Tsotsis, Alexia (May 28, 2013). "Quora Grew More Than 3X Across All Metrics In The Past Year". Retrieved November 14, 2013. 
  16. ^ Gannes, Liz (November 12, 2013). "Quora Gives Its Writers a Stats Dashboard". AllThingsD. Retrieved November 14, 2013. 
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  23. ^ Constine, Josh (May 11, 2014). "Q: Why Did Quora Join Y Combinator? A: It Was Almost Free". TechCrunch. Retrieved May 11, 2014. 
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  27. ^ "Quora begins testing ads on 'small number' of question pages". VentureBeat. Retrieved August 7, 2016. 
  28. ^ "Quora en español launches out of beta". VentureBeat. Retrieved October 21, 2016. 
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  30. ^ "Quora Terms of Service". Retrieved February 15, 2017. 
  31. ^ Mlot, Stephanie (February 15, 2013). "Quora adds options for sharing with unregistered users". PC Mag. Retrieved July 31, 2016. 
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  68. ^ "Quora's first acquisition is Arab Spring instigator's Q&A site Parlio". Techcrunch.com. Retrieved April 27, 2016. 
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External links

  • Official website
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