Zhihu

Corporate brand

Zhihu is a Chinese knowledge-sharing platform combining user-generated questions and answers, social discussion, content discovery, live interaction, and AI-assisted search.

Last updated November 4, 2026

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Overview

Zhihu is a Chinese internet platform centered on questions, answers, explanations, and knowledge-oriented discussion. It was developed from August 2010 and launched publicly on January 26, 2011, initially positioning itself as a relatively selective community for professional and intellectually substantive exchanges. Its name is written 知乎 in Chinese and is associated with the classical expression “知之乎,” broadly conveying the idea of knowing or understanding. The platform began with a tightly controlled registration model. Early users generally needed invitations or had to submit extensive personal information before being admitted. This approach helped Zhihu establish a reputation for expert participation and detailed answers, although the service later broadened its audience and became a more general social-content platform. Users can ask questions, publish answers and articles, vote on contributions, follow topics and contributors, and participate in discussions. Trending rankings surface topics according to engagement signals such as likes, shares, and impressions. Zhihu expanded beyond its original question-and-answer format through expert panels, newsletters, live events, paid live sessions, video creation tools, and other creator-oriented features. Its live product allows individuals and organizations to host either free or paid broadcasts. In October 2020, the company introduced a video creation tool designed to lower production barriers by helping users select images and create voiceovers from text. Commercialization formally accelerated in 2017. The company raised several major private financing rounds backed by investors that included Innovation Works, Qiming Venture Partners, SAIF Partners, Tencent-related investment entities, Sogou, Baidu, and Kuaishou. Zhihu completed a New York Stock Exchange initial public offering on March 26, 2021, and later began trading in Hong Kong on April 11, 2022. The company has therefore operated both as a consumer internet community and as a publicly traded digital-content business. Zhihu has also operated under China’s regulatory environment for online information services. In March 2018, Chinese authorities required app stores to remove the Zhihu application temporarily over alleged illegal content and inadequate monitoring. In December 2021, the company was instructed to rectify practices associated with unlawful information disclosure, followed by a reported transfer of stakes from several shareholders to founder and chief executive Zhou Yuan. In July 2023, Zhihu discontinued anonymous posting for new activity, while previously published anonymous posts were not automatically affected. The platform’s product direction has increasingly included intellectual property and artificial-intelligence applications. In 2023, Zhihu introduced Yanyan Stories, a story-oriented feature through which user-created short fiction could be adapted into novels and, in some cases, screen productions. On June 29, 2024, it launched Zhida, an AI search and answer service. Zhida is designed to combine Zhihu’s content archive with external links and generated summaries, offering searches by content or contributor and options for brief or in-depth answers. In 2025, Zhihu presented the Yanyan Story Platform at the Frankfurt Book Fair, describing an international content and licensing direction covering books, digital reading, audio dramas, and cultural products in multiple languages. Today, Zhihu’s brand spans community-generated knowledge, creator tools, content distribution, paid interaction, literary adaptation, and AI-assisted discovery. Its core differentiation remains the accumulated archive of questions and answers and the authority associated with knowledgeable contributors, while its continuing challenge is balancing growth, monetization, content quality, privacy, and regulatory compliance.

History

Zhihu began development in August 2010 and conducted closed beta testing near the end of that year. The public service launched on January 26, 2011. Its early operating model emphasized selectivity: many users joined through invitations, while applicants without referrals were expected to provide extensive personal information and wait for approval. This helped establish an initial community oriented toward professional questions, detailed explanations, and expert participation. The service grew rapidly during its first several years. It exceeded 10 million registered users by the end of 2013 and was reported to have reached 17 million users by May 2015, alongside substantial monthly page-view activity. Zhihu raised an approximately US$7 million Series A round in 2011 from Innovation Works and Qiming Venture Partners, later completing a reported US$55 million Series C round in 2015. Investors associated with the company included Innovation Works, Qiming Venture Partners, SAIF Partners, Tencent, and Sogou. Zhihu formally commercialized in 2017. Its business expanded beyond a narrow question-and-answer site into a broader content platform with articles, topic rankings, newsletters, expert panels, live broadcasts, and paid knowledge events. In August 2018, the company completed an E-round of approximately US$270 million at a reported valuation of US$2.5 billion. In August 2019, it raised a further approximately US$450 million in a round led by Kuaishou and Baidu. The Baidu relationship also enabled Zhihu material to appear directly in Baidu mobile search results. Regulation became an important part of Zhihu’s operating history. In March 2018, Chinese authorities required major app stores to remove the application for seven days because of alleged illegal content and insufficient monitoring. The incident illustrated the compliance risks faced by large user-generated-content platforms in China. In December 2021, the company was reportedly required to correct practices related to unlawful disclosure of information. Around the same period, ten shareholders, including Sogou and a Tencent investment arm, reportedly sold their holdings in the parent company to founder and chief executive Zhou Yuan, leaving him with more than 99 percent ownership according to the cited account. Zhihu became publicly traded in the United States on March 26, 2021, through an initial public offering on the New York Stock Exchange. It subsequently began trading in Hong Kong on April 11, 2022. The company continued broadening its product mix. In October 2020 it had launched a video creation tool capable of suggesting images and generating voiceovers from text. Its live product supported both free and paid broadcasts, allowing individuals and organizations to charge viewers for access. In July 2023, Zhihu ended support for anonymous posting, although the change did not remove previously published anonymous material. The platform also developed a literary and intellectual-property direction through Yanyan Stories. Introduced in 2023, the feature allowed short stories posted by users to be developed into novels, with some works adapted for film and television. In October 2025, Zhihu presented the Yanyan Story Platform at the Frankfurt Book Fair. The international proposition included books, digital reading, audio dramas, and related cultural products, with selected works available in languages including English, Indonesian, Spanish, Korean, Japanese, Portuguese, and Thai. Artificial intelligence became another strategic extension. On June 29, 2024, Zhihu launched Zhida, a large-language-model search and answer service. Zhida is designed to combine answers from Zhihu’s content archive with external web links, and to support searches by content or contributor as well as short or detailed generated responses. Zhihu’s evolution therefore reflects a shift from a selective Q&A community to a multifaceted knowledge and content ecosystem spanning social discussion, creator tools, paid interaction, search, AI synthesis, and intellectual-property licensing.

2025
Yanyan Story Platform presented internationally
[1]Zhihu - Wikipediaen.wikipedia.org
Zhihu presents an international Yanyan Story Platform at the Frankfurt Book Fair.
2024
Zhida AI search launches
[1]Zhihu - Wikipediaen.wikipedia.org
Zhihu launches Zhida, an AI-assisted search and answer product, on June 29.
2023
Anonymous posting discontinued
[1]Zhihu - Wikipediaen.wikipedia.org
Zhihu stops supporting new anonymous posting in July.
2022
Hong Kong listing
[1]Zhihu - Wikipediaen.wikipedia.org
Zhihu begins trading on the Hong Kong Stock Exchange on April 11.
2021
New York Stock Exchange listing
[1]Zhihu - Wikipediaen.wikipedia.org
Zhihu completes its initial public offering on the NYSE on March 26.
2020
Video creation tool launches
[1]Zhihu - Wikipediaen.wikipedia.org
Zhihu introduces tooling intended to make text-to-video creation easier for contributors.
2019
F-round financing
[1]Zhihu - Wikipediaen.wikipedia.org
Zhihu raises approximately US$450 million in a round led by Kuaishou and Baidu.
2018
E-round financing and regulatory removal
[1]Zhihu - Wikipediaen.wikipedia.org
Zhihu reports a major private financing round while its application is temporarily removed from Chinese app stores over content-monitoring concerns.
2017
Commercialization
[1]Zhihu - Wikipediaen.wikipedia.org
Zhihu officially commercializes its platform and expands its monetization efforts.
2013
User base exceeds ten million
[1]Zhihu - Wikipediaen.wikipedia.org
Registered users surpass 10 million by the end of 2013.
2011
Public launch
[1]Zhihu - Wikipediaen.wikipedia.org
The Zhihu website goes online on January 26, 2011.
2011
Series A financing
[1]Zhihu - Wikipediaen.wikipedia.org
Zhihu completes a reported US$7 million Series A financing round backed by Innovation Works and Qiming Venture Partners.
2010
Development begins
[1]Zhihu - Wikipediaen.wikipedia.org
Zhihu begins development in August and conducts closed beta testing near the end of the year.

Products and positioning

A Chinese knowledge and content community that combines expert-oriented questions and answers with social discovery, creator monetization, live interaction, literary content development, and AI-assisted search.

Knowledge-sharing community · 2011
Zhihu Questions and Answers
Zhihu’s core service lets users submit questions, publish answers, follow topics and contributors, and vote on useful contributions. The product originally emphasized professional and expert-oriented discussion, but broadened over time into a general community for knowledge, opinion, explanation, and experience-sharing.
Content discovery
Trending
Trending is Zhihu’s leaderboard and discovery layer. It ranks popular topics using engagement-related signals such as likes, shares, and impressions, helping users find discussions receiving substantial attention across the platform.
Live interaction
Zhihu Live
Zhihu Live allows individuals and organizations to host live broadcasts and knowledge sessions. Events may be free or paid, with paid sessions requiring viewers to purchase access.
Creator tools · 2020
Zhihu Video Creation Tool
Introduced in 2020, this tool was designed to reduce the technical effort required to produce videos. It could recommend images and generate voiceovers from text, extending Zhihu’s creator ecosystem beyond written answers and articles.
Stories and intellectual property · 2023
Yanyan Stories
Yanyan Stories is a story-oriented product and content program built around short fiction published by Zhihu users. Selected stories can be developed into novels and may be adapted for film and television, creating a bridge between community content and broader cultural-product licensing.
Artificial-intelligence search · 2024
Zhida
Zhida is Zhihu’s large-language-model search and answer product. It is intended to combine the platform’s internal content archive with external links and generated summaries. Users can search by content or contributor and request brief or more detailed answers.
International publishing and cultural products · 2025
Yanyan Story Platform
Presented internationally in 2025, the Yanyan Story Platform extends the Yanyan concept into books, digital reading, audio dramas, and other cultural products. The announced international direction included multilingual licensing and distribution.

Controversies

2022
Sangfor employee-monitoring system raises privacy concerns
An article reported claims that Sangfor's behavior-awareness system can monitor employees' internet activity and identify employees considered likely to leave. Lawyers said monitoring without informing employees and obtaining their consent could constitute unlawful processing of personal information or infringe privacy. The article also reported that the product description had become unavailable on Sangfor's website.
Source
2021
Regulatory rectification and shareholder transfer
Zhihu was reportedly instructed to rectify practices associated with unlawful release of information. Soon afterward, several shareholders reportedly transferred their stakes in the parent company to founder Zhou Yuan, who was reported to hold more than 99 percent thereafter.
Source
2021
Douyin sues Zhihu over hot-list content
Douyin filed a lawsuit against Zhihu in the Beijing Internet Court, alleging that a Zhihu hot-list topic and its answers contained false information that defamed Douyin. In the suit, Douyin sought the deletion of the content, an apology, and compensation for economic losses. The dispute concerns content published on Zhihu's hot list and the responses associated with it.
Source
2020
Court upholds ruling against Zhihu platform operator
In a ruling dated August 4, 2020, the Shanghai No. 1 Intermediate People's Court dismissed an appeal by Zhihu and upheld the original judgment against the platform operator. The court found that the platform had failed to take necessary measures in time regarding infringing content. As a result, the platform operator was held jointly liable with the publishers of that content for the harm that the infringement expanded into. The decision affirmed the earlier finding of liability rather than reversing it on appeal.
Source
2020
Zhihu responds to rectification notice
In November 2020, after being named by the Cyberspace Administration of China for rectification, the Chinese question-and-answer platform Zhihu issued a response. The company stated that it had zero tolerance for illegal and non-compliant information and that it would continue to strictly combat such information and non-compliant users. The statement followed the platform's identification by the cyberspace regulator as requiring rectification. Zhihu's response focused on its stated policy toward illegal and non-compliant content and users, without further details on specific measures or outcomes.
Source
2018
Temporary app-store removal over content compliance
Chinese cyberspace authorities required app stores to remove Zhihu for seven days, citing alleged illegal content and inadequate monitoring. The application became unavailable through Android stores and the Apple App Store during the cited period.
Source

2025Yanyan Story Platform international presentation
Germany · International publishing markets
Zhihu used the Frankfurt Book Fair to present an international version of the Yanyan Story Platform, positioning selected community-originated stories for multilingual publication and adaptation across books, digital reading, audio, and cultural products.
Outcome. The cited material states that more than 100 works had been licensed for domestic or international publication at the time.
Source

Brand decisions

2024
Launch of Zhida AI searchProduct launch
Background
Generative AI created an opportunity to make large archives of user-generated knowledge easier to search, synthesize, and present.
Action taken
Zhihu launched Zhida on June 29, combining platform content, external links, search, and generated answers.
Aftermath
Zhida extended Zhihu’s proposition from hosting knowledge to generating and summarizing answers from it.
Source
2023
End of support for anonymous postingStrategy
Background
Anonymous content had to operate within a platform environment increasingly focused on monitoring, accountability, and regulatory compliance.
Action taken
Zhihu stopped supporting new anonymous posting in July, while previously published posts were not affected.
Aftermath
New contributions were tied more directly to identifiable accounts, although the cited material does not quantify the effect on user behavior.
Source
2022
Hong Kong listingOther
Background
A second public-market venue provided Zhihu with a listing in Hong Kong after its New York debut.
Action taken
Zhihu began trading on the Hong Kong Stock Exchange on April 11.
Aftermath
The company maintained dual-market public trading.
Source
2021
New York Stock Exchange initial public offeringOther
Background
Zhihu pursued public-market financing after years of user growth, commercialization, and venture investment.
Action taken
The company completed its initial public offering and began trading on the New York Stock Exchange on March 26.
Aftermath
Zhihu became a publicly traded company and later added a Hong Kong listing.
Source
2020
Launch of video creation toolsProduct launch
Background
Zhihu sought to reduce the production barrier for creators and extend participation beyond text-based answers.
Action taken
The company launched a tool that could suggest images and generate voiceovers from written text.
Aftermath
The product broadened Zhihu’s creator-tool offering into short-form video production.
Source
2017
Formal commercialization of the platformStrategy
Background
After operating primarily as a selective knowledge community, Zhihu needed to broaden its business model and support larger-scale growth.
Action taken
Zhihu officially commercialized and expanded into a wider mix of content, creator, live, and monetization services.
Aftermath
The platform developed into a broader content business and subsequently raised large private rounds before entering public markets.
Source

Recent events

Unconfirmed
Sangfor employee-monitoring system raises privacy concerns[5]Sangfor employee-monitoring system raises privacy concernsdonews.com
The article reported claims that Sangfor's behavior-awareness system can monitor employees' internet activity and identify employees considered likely to leave. Lawyers said monitoring without informing employees and obtaining their consent could constitute unlawful processing of personal information or infringe privacy. The article also reported that the product description had become unavailable on Sangfor's website.
Unconfirmed
Zhihu receives two ISO certifications[6]知乎获得两项ISO认证itbear.com.cn
Zhihu received ISO/IEC 27001:2013 information security management and ISO/IEC 27701:2019 privacy information management certifications from DNV.
2021-09-28
Douyin sues Zhihu over hot-list content[4]Douyin sues Zhihu over hot-list contentchinaz.com
Douyin sued Zhihu in Beijing Internet Court, alleging that a Zhihu hot-list topic and answers contained false information that defamed Douyin, and seeking deletion of the content, an apology, and compensation.
2021-08-16
Zhihu reports second-quarter 2021 financial results[7]知乎公布2021年第二季度财务业绩prnewswire.com
Reported: 2021-08-16
Zhihu announced unaudited financial results for the second quarter ended June 30, 2021, reporting total revenue of RMB638.4 million and a net loss of RMB321.1 million.
2021-03-05
Zhihu files for U.S. IPO[8]知乎提交美国 IPO 申请finance.sina.com.cn
Reported: 2021-03-05
Zhihu filed its initial public offering application with the U.S. Securities and Exchange Commission and planned to list on the New York Stock Exchange under ticker ZH.
2021-02-21
Black Cat Complaints and partners launch consumer-rights lead collection[9]黑猫投诉等平台启动消费维权线索征集finance.sina.com.cn
Reported: 2021-02-21
Black Cat Complaints, Beijing News Shell Finance, and Zhihu launched a collection of leads for consumer-rights issues ahead of the March 15 consumer-rights event.
Unconfirmed
Zhihu refreshes its visual identity[10]知乎焕新品牌视觉形象itbear.com.cn
Zhihu refreshed its brand visuals, changing its icon from “知” to “知乎” and adopting a deeper, brighter brand color.
Unconfirmed
Zhihu reportedly starts IPO process[11]知乎据报启动上市程序citnews.com.cn
The article reported that Zhihu had started the IPO process and was considering a U.S. or Hong Kong listing venue.
2020-12-23
Zhihu reportedly prepares IPO application for a possible US or Hong Kong listing[12]知乎据报准备IPO申请，拟考虑美国或香港上市finance.sina.com.cn
Reported: 2020-12-23
A report citing an exclusive source said Zhihu was preparing an IPO report and listing application, and that its listing venue might be the United States or Hong Kong, with the venue still unconfirmed. This is a reported preparation, not a completed listing.
Unconfirmed
Zhihu responds to rectification notice[3]Zhihu responds to rectification noticechinaz.com
After being named by the Cyberspace Administration of China for rectification, Zhihu said it had zero tolerance for illegal and non-compliant information and would continue to strictly combat such information and non-compliant users.

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