WeChat

WeChat/Weixin (微信)

Developer(s)	Tencent Holdings Limited
Initial release	21 January 2011; 13 years ago (2011-01-21) (as Weixin)
Preview release(s)
Android 8.0.47 / 1 February 2024; 8 months ago (2024-02-01)[1]
Operating system	Android, HarmonyOS,[2] iOS, macOS, Windows, Windows Phone, WatchOS, Wear OS, MIUI
Service name	WeChat (International)[3] Weixin (China Mainland)[4]
Available in	17 languages
List of languages Simplified Chinese, Traditional Chinese, Japanese, Korean, English, French, German, Italian, Spanish, Portuguese, Russian, Indonesian, Malay, Thai, Vietnamese, Arabic, Turkish
Type	Instant messaging client
License	Proprietary freeware
Website	wechat.com (WeChat) weixin.qq.com (Weixin)

WeChat or Weixin in Chinese (Chinese: 微信; pinyin: Wēixìn (listen^ⓘ); lit. 'micro-message')^[a] is a Chinese instant messaging, social media, and mobile payment app developed by Tencent. First released in 2011, it became the world's largest standalone mobile app in 2018^[5][6] with over 1 billion monthly active users.^[7][8][9] WeChat has been described as China's "app for everything" and a super-app because of its wide range of functions.^[10] WeChat provides text messaging, hold-to-talk voice messaging, broadcast (one-to-many) messaging, video conferencing, video games, mobile payment, sharing of photographs and videos and location sharing.

Accounts registered using Chinese phone numbers are managed under the Weixin brand, and their data is stored in mainland China and subject to Weixin's terms of service and privacy policy, which forbids content which "endanger[s] national security, divulge[s] state secrets, subvert[s] state power and undermine[s] national unity".^[11] Non-Chinese numbers are registered under WeChat, and WeChat users are subject to a different, less strict terms of service and stricter privacy policy, and their data is stored in the Netherlands for users in the European Union, and in Singapore for other users.^[12][13] User activity on Weixin, the Chinese version of the app, is analyzed, tracked and shared with Chinese authorities upon request as part of the mass surveillance network in China.^[b] Chinese-registered Weixin accounts censor politically sensitive topics.^[c][18][23] Any interactions between Weixin and WeChat users are subject to the terms of service and privacy policies of both services.^[24]

By 2010, Tencent had already attained a massive user base with their desktop messenger app QQ. Recognizing smart phones were likely to disrupt this status quo, CEO Pony Ma sought to proactively invest in alternatives to their own QQ messenger app.^[25]

WeChat began as a project at Tencent Guangzhou Research and Project center in October 2010.^[26] The original version of the app was created by Allen Zhang, named "Weixin" (微信) by Pony Ma,^[27] and launched in 2011. The user adoption of WeChat was initially very slow, with users wondering why key features were missing; however, after the release of the Walkie-talkie-like voice messaging feature in May of that year, growth surged.^[25] By 2012, when the number of users reached 100 million, Weixin was re-branded "WeChat" by President Martin Lau for the international market.^[28]

During a period of government support of e-commerce development—for example in the 12th five-year plan (2011–2015)^[29]—WeChat also saw new features enabling payments and commerce in 2013, which saw massive adoption after their virtual Red envelope promotion for Chinese New Year 2014.^[25]

WeChat had over 889 million monthly active users by 2016, and as of 2019 WeChat's monthly active users had risen to an estimate of one billion. As of January 2022, it was reported that WeChat has more than 1.2 billion users.^[30] After the launch of WeChat payment in 2013, its users reached 400 million the next year,^[31][32][33] 90 percent of whom were in China.^[34] By comparison, Facebook Messenger and WhatsApp had about one billion monthly active users in 2016 but did not offer most of the other services available on WeChat.^[6][35] For example, in Q2 2017, WeChat's revenues from social media advertising were about US$0.9 billion (RMB6 billion) compared with Facebook's total revenues of US$9.3 billion, 98% of which were from social media advertising. WeChat's revenues from its value-added services were US$5.5 billion.^[36]

By 2018, WeChat had been used by 93.5% of Chinese internet users.^[37]: 76

In response to a border dispute between India and China, WeChat was banned in India in June 2020 along with several other Chinese apps, including TikTok.^[38][39] U.S. president Donald Trump sought to ban U.S. "transactions" with WeChat through an executive order^[40] but was blocked by a preliminary injunction issued in the United States District Court for the Northern District of California in September 2020.^[41] Joe Biden officially dropped Trump's efforts to ban WeChat in the U.S. in June 2021.^[42]

WeChat provides a variety of features including text messaging, hold-to-talk voice messaging, broadcast (one-to-many) messaging, video calls and conferencing, video games, photograph and video sharing, as well as location sharing.^[43] WeChat also allows users to exchange contacts with people nearby via Bluetooth, as well as providing various features for contacting people at random if desired (if people are open to it). It can also integrate with other social networking services such as Facebook and Tencent QQ.^[44] Photographs may also be embellished with filters and captions, and automatic translation service is available and could also translate the conversation during messaging.

WeChat supports different instant messaging methods, including text messages, voice messages, walkie talkie, and stickers. Users can send previously saved or live pictures and videos, profiles of other users, coupons, lucky money packages, or current GPS locations with friends either individually or in a group chat.

WeChat also provides a message recall feature^[45] to allow users to recall and withdraw information (e.g. Images, documents) that are sent within 2 minutes in a conversation. To use this feature, users can select the message or file to be recalled by long pressing. In the menu that appears select 'recall' and 'ok' to complete the withdrawal process. Eventually, the selected messages or files will be removed from the WeChat chatting box on both the sender's and recipient's phones.

WeChat also provides a voice-to-text feature that brings convenience when it is not convenient to listen to voice messages, as well as the basic ability to recognize emojis based on different tones of voice, but the privacy leaks involved are also thought-provoking.

A distance sensing feature is implemented in WeChat. It has the ability to activate the receivers' hold-to-talk function when the phone was brought in close proximity to the ear. After the receiver was held at a certain distance from the ear, the sensor would then proceed to automatically disable the phone speakers. This feature eliminates the risk of the user's voice messages being inadvertently broadcast to the general public.^[46]

WeChat users can register as a public account (公众号), which enables them to push feeds to subscribers, interact with subscribers, and provide subscribers with services. Users can also create an official account, which fall under service, subscription, or enterprise accounts. Once users as individuals or organizations set up a type of account, they cannot change it to another type. By the end of 2014, the number of WeChat official accounts had reached 8 million.^[47] Official accounts of organizations can apply to be verified (cost 300 RMB or about US$45). Official accounts can be used as a platform for services such as hospital pre-registrations,^[48] or credit card service.^[49] To create an official account, the applicant must register with Chinese authorities, which discourages "foreign companies".^[50] In April 2022, WeChat announced that it will start displaying the location of users in China everytime they post on a public account. Meanwhile, overseas users on public accounts will also display the country based on their IP address.^[51]

"Moments" (朋友圈) is WeChat's brand name for its social feed of friends' updates. "Moments" is an interactive platform that allows users to post images, text, and short videos taken by users. It also allows users to share articles and music (associated with QQ Music or other web-based music services). Friends in the contact list can like the content and leave comments, functioning similarly to a private social network.^[44]

In 2017 WeChat had a policy of a maximum of two advertisements per day per Moments user.^[35]

Privacy in WeChat works by groups of friends: only the friends from the user's contact are able to view their Moments' contents and comments. The friends of the user will only be able to see the likes and comments from other users only if they are in a mutual friend group. For example, friends from high school are not able to see the comments and likes from friends from a university. When users post their moments, they can separate their friends into a few groups, and they can decide whether this Moment can be seen by particular groups of people.^[52] Contents posted can be set to "Private", and then only the user can view it. Unlike Weibo or Instagram, these are only shared to the user's friends. These are unlikely to go viral.

Recently, WeChat launched a new foundation that users can choose to top their posts in their own Moments. No matter how long the posts can be viewed set by users, the posts topped by them can be seen all the time. This foundation enable people to mark some important posts that it will be easy to find them. Besides, users can permanently display some posts while ensuring overall privacy.

Users who have provided bank account information may use the app to pay bills, order goods and services, transfer money to other users, and pay in stores if the stores have a Weixin payment option. Vetted third parties, known as "official accounts", offer these services by developing lightweight "apps within the app".^[53] Users can link their Chinese bank accounts, as well as Visa, MasterCard and JCB.^[54]

WeChat Pay, officially referred to as Weixin Pay (微信支付) in China, is a digital wallet service incorporated into Weixin, which allows users to perform mobile payments and send money between contacts.^[55]

Although users receive immediate notification of the transaction, the Weixin Pay system is not an instant payment instrument, because the funds transfer between counterparts is not immediate.^[56] The settlement time depends on the payment method chosen by the customer.

All Weixin users have their own Weixin Pay accounts. Users can acquire a balance by linking their Weixin account to their debit cards, or by receiving money from other users. For non-Chinese users of Weixin Pay, an additional identity verification process of providing a photo of a valid ID is required before certain functions of Weixin Pay become available. Users who link their credit card can only make payments to vendors, and cannot use this to top up WeChat balances. Weixin Pay can be used for digital payments, as well as payments from participating vendors.^[57] As of March 2016, Weixin Pay had over 300 million users.^[58]

Weixin Pay's main competitor in China and the market leader in online payments is Alibaba Group's Alipay. Alibaba company founder Jack Ma considered Weixin's red envelope feature to be a "Pearl Harbor moment", as it began to erode Alipay's historic dominance in the online payments industry in China, especially in peer-to-peer money transfer. The success prompted Alibaba to launch its own version of virtual red envelopes in its competing Laiwang service. Other competitors, Baidu Wallet and Sina Weibo, also launched similar features.^[57]

In 2019 it was reported that Weixin had overtaken Alibaba with 800 million active Weixin mobile payment users versus 520 million for Alibaba's Alipay.^[35][59] However Alibaba had a 54 per cent share of the Chinese mobile online payments market in 2017 compared to Weixin's 37 per cent share.^[60] In the same year, Tencent introduced "WeChat Pay HK", a payment service for users in Hong Kong. Transactions are carried out with the Hong Kong dollar.^[61] In 2019 it was reported that Chinese users can use WeChat Pay in 25 countries outside China, including, Italy, South Africa and the UK.^[59]

For work purposes, companies and business communication, a special version of WeChat called WeCom (formally known as Enterprise WeChat (or Qiye Weixin) and WeChat Work before Nov 2020) was launched in 2016.^[62] The app was meant to help employees separate work from private life.^[63] In addition to the usual chat features, the program let companies and their employees keep track of annual leave days and expenses that need to be reimbursed, employees could ask for time off or clock in to show they were at work.^{[63][64][65][66]}

In 2017, WeChat launched a feature called "Mini Programs" (小程序).^[67] A mini program is an app within an app. Business owners can create mini apps in the WeChat system, implemented using JavaScript plus a proprietary API.^[68] Users may install these inside the WeChat app. In January 2018, WeChat announced a record of 580,000 mini programs.^[69] With one Mini Program, consumers could scan the Quick Response code using their mobile phone at a supermarket counter and pay the bill through the user's WeChat mobile wallet.^[29] WeChat Games have received huge popularity, with its "Jump Jump" game attracting 400 million players in less than 3 days and attaining 100 million daily active users in just two weeks after its launch, as of January 2018.^[70][71][72] Ever since WeChat Mini Program's Launch, the daily active user count of WeChat Mini Programs are increasing dramatically. In 2017, there were only 160 million daily active users, however, the number reached 450 million in 2021.^[73]

In 2020, WeChat Channels were launched. They are a short video platform within WeChat that allows users to create and share short video clips and photos to their own WeChat Channel. Users of Channels can also discover content posted to other Channels by others via the in-built feed. Each post can include hashtags, a location tag, a short description, and a link to an WeChat official account article.^[74] In September 2021, it was reported that WeChat Channels began allowing users to upload hour-long videos, twice of the duration limit previously imposed on all WeChat Channels videos. Comparisons are often drawn between WeChat Channels and TikTok (or Douyin) for their similarity in features.

^[75] In January 2022, there were reports that WeChat is set to diversify further and place more emphasis on new products and services like WeChat Channels, amid new regulatory restrictions imposed in China.^[30]

By June 2021, WeChat Channels had accumulated over 200 million users, and WeChat Channels have 500 million DAU (Daily Active Users), growing at 79% year-on -year.^[76] More than 27 million people had used the platform to watch Irish boy band Westlife's online concert in 2021, and 15 million users also viewed the Shenzhou 12 spaceflight launch using the app service.^[30]

In September 2021, WeChat introduced a brand-new feature on its platform called Easy Mode. It was mainly designed for elderly people with higher readability by providing a larger font size, sharper colours, and bigger buttons.^[77] Another feature provided in this update was the ability to listen to text messages. Easy Mode was released in version 8.0.14 for both iOS and Android.^[78]

Guardian Mode is a function in WeChat for protecting users under 14 years old. It was introduced to promote safety and provide security environment for WeChat users. After operating the Guardian Mode, the functions of "people nearby", "games", "search" will not be accessible in the interface. The channels function in WeChat, a video mini program, would only show contents suitable for adolescents. Additionally, WeChat users who turn on the Guardian Mode are only able to add friends through QR codes and group chats. Moreover, WeChat users would only be able to view 10 latest Moments posts and would not be able to view the 10 latest Moments posts of non-friend users under the privacy setting of Guardian Mode.

In January 2016, Tencent launched WeChat Out, a VOIP service allowing users to call mobile phones and landlines around the world. The feature allowed purchasing credit within the app using a credit card. WeChat Out was originally only available in the United States, India, and Hong Kong, but later coverage was expanded to Thailand, Macau, Laos, and Italy.^[79][80]

In March 2017, Tencent released WeChat Index. By inserting a search term in the WeChat Index page, users could check the popularity of this term in the past 7, 30, or 90 days.^[81] The data was mined from data in official WeChat accounts and metrics such as social sharing, likes and reads were used in the evaluation.

In May 2017, Tencent started news feed and search functions for its WeChat app. The Financial Times reported this was a "direct challenge to Chinese search engine Baidu".^[82]

In 2017, WeChat was reported to be developing an augmented reality (AR) platform as part of its service offering. Its artificial intelligence team was working on a 3D rendering engine to create a realistic appearance of detailed objects in smartphone-based AR apps. They were also developing a simultaneous localization and mapping technology, which would help calculate the position of virtual objects relative to their environment, enabling AR interactions without the need for markers, such as Quick Response codes or special images.^[83]

Chinese courts allow the parties to communicate with the courts via WeChat, through which parties can file lawsuits, participate in proceedings, present evidence, and listen to verdicts.^[84]: 125 As of December 2019, more than 3 million parties had used WeChat for litigation.^[84]: 125

In spring 2020, WeChat users are now able to change their WeChat ID more than once, being allowed to change their username only once per year.^[85][86] Prior to this, a WeChat ID could not be changed more than once.

On 17 June 2020, WeChat released a new add-on called "WeChat Nudge". The feature was first introduced in MSN Messenger 7.0, in 2005. The feature was called Buzz in Yahoo! Messenger and the feature had interoperability with MSN Messenger's Nudge. Similar to Messenger and Yahoo, users can access WeChat Nudge by double-clicking on other users' profiles in the chat. This virtually shakes user's profile photo and sends a vibration notification. Both users must have the latest Wechat update. If a user does not have the latest update they will be unable to nudge another user, but can still receive nudges. A user can only nudge another user if they have previous conversations. Newly added friends without previous messages cannot nudge each other.^[87]

On January 16, 2022, a new version of WeChat has added seven major functions for the iOS 8.0.17, Android 8.0.18 or newer version users. In the function of Personal Information Authority, users can check the number of times personal information has been edited in the past year through the personal information collection list, including head portrait, name, mobile number, gender, region, personalized signature, and address.^[88]

On March 30, 2022, according to the relevant laws and regulations of China, in order to prevent the risk of publicity stunts in virtual currency transactions, the Wechat public platform standardized the official account and mini program of secondary sales of digital collections.

WeChat Business (微商) is one of the latest mobile social network business model after e-commerce, which utilizes business relationships and friendships to maintain a customer relationship.^[89] Comparing with the traditional E-business like JD.com and Alibaba, WeChat Business has a large range of influence and profits with less input and lower threshold, which attracts lots of people to join in WeChat business.^[90]

This is the main profit mode of WeChat Business. The first one is to launch advertisements and provide services through the WeChat Official Account, which is a B2C mode. This mode has been used by many hospitals, banks, fashion brands, internet companies and personal blogs because the Official Account can access online payment, location sharing, voice messages, and mini-games. It is like a 'mini app', so the company has to hire specific staff to manage the account. By 2015, there were more than 100 million WeChat Official Accounts on this platform.^[91]

WeChat salesperson in this mode is for promoting products by individuals, which belongs to C2C mode. In this mode, individual sellers post relevant photos and messages of their agent products on the WeChat Moments or WeChat groups and sell products to their WeChat friends. Besides, they develop friendships with their customers by sending messages in festivals or write comments under their updates on WeChat moments to increase their trust. Also, continuing to communicate with the regular customers raises the 'WOF' (word-of-mouth) communications, which influences decision-making. Some WeChat businessmen already have an online shop in Taobao, but use WeChat to maintain existing customers.^[92]

As more and more people have joined WeChat Business, it has brought many problems. For example, some sellers have begun to sell counterfeit luxury goods such as bags, clothes and watches. Some sellers have disguised themselves as international flight attendants or overseas students to post fake stylish photos on WeChat Moments. They then claim that they can provide overseas purchasing services but sell counterfeit luxury goods at the same price as the authentic ones.^[93] Other popular products selling on WeChat are facial masks. The marketing mode is like that of Amway but most goods are unbranded products which come from illegal factories making excess hormones which could have serious effects on customers' health.^[94] However, it is difficult for customers to defend their rights because a large number of sellers' identities are uncertified. Additionally, the lack of any supervision mechanism in WeChat business also provides opportunities for criminals to continue this illegal behavior.^[95][96] In early 2022, WeChat suspended more than a dozen NFT (non-fungible token) public accounts to clean up crypto speculation and scalping. The crackdown on NFT-related content comes from domestic digital collectibles, which cannot be resold for profit.^[97]

In a 2016 campaign, users could upload a paid photo on "Moments" and other users could pay to see the photo and comment on it. The photos were taken down each night.^[98]

In 2014, Burberry partnered with WeChat to create its own WeChat apps around its fall 2014 runway show, giving users live streams from the shows.^[99] Another brand, Michael Kors used WeChat to give live updates from their runway show, and later to run a photo contest "Chic Together WeChat campaign".^[100]

In 2016, L'Oréal China cooperated with Papi Jiang to promote their products. Over one million people watched her first video promoting L'Oreal's beauty brand MG.^[101][102]

In 2016, WeChat partnered with 60 Italian companies (WeChat had an office in Milan) who were able to sell their products and services on the Chinese market without having to get a license to operate a business in China.^[103] In 2017, Andrea Ghizzoni, European director of Tencent, said that 95 percent of global luxury brands used WeChat.^[103]

In 2020 Burberry and WeChat collaborated to design a shop in Shenzhen where Burberry has a flagship store, as well as an app allowing shoppers to interact with the shop digitally.^[104]

WeChat's mobile phone app is available only to Android and iOS.^[105] BlackBerry, Windows Phone, and Symbian phones were supported before. However, as of 22 September 2017, WeChat was no longer working on Windows Phones.^[106][107] The company ceased the development of the app for Windows Phones before the end of 2017. Although Web-based OS X^[108] and Windows^[109] clients exist, this requires the user to have the app installed on a supported mobile phone for authentication, and neither message roaming nor 'Moments' are provided.^[110] Thus, without the app on a supported phone, it is not possible to use the web-based WeChat clients on the computer.

The company also provides WeChat for Web, a web-based client with messaging and file transfer capabilities. Other functions cannot be used on it, such as the detection of nearby people, or interacting with Moments or Official Accounts. To use the Web-based client, it is necessary to first scan a QR code using the phone app. This means it is not possible to access the WeChat network if a user does not possess a suitable smartphone with the app installed.^[111]

WeChat could be accessed on Windows using BlueStacks until December 2014. After that, WeChat blocked Android emulators and accounts that have signed in from emulators may be frozen.^[112]

There have been some reported issues with the Web client.^[113] Specifically when using English, some users have experienced autocorrect, autocomplete, auto-capitalization, and auto-delete behavior as they type messages and even after the message was sent. For example, "gonna" was autocorrected to "go", the E's were auto-deleted in "need", "wechat" was auto-capitalized to "Wechat" but not "WeChat", and after the message was sent, "don't" got auto-corrected to "do not". However, the auto-corrected word(s) after the message was sent appeared on the phone app as the user had originally typed it ("don't" was seen on the phone app whereas "do not" was seen on the Web client). Users could translate a foreign language during a conversation and the words were posted on Moments.^[114]

WeChat allows group video calls.

Weixin, the Chinese version of WeChat, operates from China under Chinese law, which includes strong censorship provisions and interception protocols.^[115] Its parent company is obliged to share data with the Chinese government under the China Internet Security Law and National Intelligence Law.^[116][117] Weixin can access and expose the text messages, contact books, and location histories of its users.^[115] Due to Weixin's popularity, the Chinese government uses Weixin as a data source to conduct mass surveillance in China.^{[14][15][16][118]}

Some states and regions such as India,^{[115][119][120]} Australia^[121] the United States,^[122] and Taiwan fear that the app poses a threat to national or regional security for various reasons.^[115][123] In June 2013, the Indian Intelligence Bureau flagged WeChat for security concerns. India has debated whether or not they should ban WeChat for the possibility that too much personal information and data could be collected from its users.^{[119][124][125]} In Taiwan, legislators were concerned that the potential exposure of private communications was a threat to regional security.

In 2016, Tencent was awarded a score of zero out of 100 in an Amnesty International report ranking technology companies on the way they implement encryption to protect the human rights of their users.^[126] The report placed Tencent last out of a total of 11 companies, including Facebook, Apple, and Google, for the lack of privacy protections built into Weixin and QQ. The report found that Tencent did not make use of end-to-end encryption, which is a system that allows only the communicating users to read the messages.^[127] It also found that Tencent did not recognize online threats to human rights, did not disclose government requests for data, and did not publish specific data about its use of encryption.^[128]

A September 2017 update to the platform's privacy policy detailed that log data collected by Weixin included search terms, profiles visited, and content that had been viewed within the app. Additionally, metadata related to the communications between Weixin users—including call times, duration, and location information—was also collected. This information, which was used by Tencent for targeted advertising and marketing purposes, might be disclosed to representatives of the Chinese government:^[129][130]

1. To comply with an applicable law or regulations.
2. To comply with a court order, subpoena, or other legal process.
3. In response to a request by a government authority, law enforcement agency, or similar body.

In May 2020, Citizen Lab published a study which claimed that WeChat monitors foreign chats to hone its censorship algorithms.^{[131][132][133]}

On August 14, 2020, Radio Free Asia reported that in 2019, Gao Zhigang, a citizen of Taiyuan city, Shanxi Province, China, used Weixin to forward a video to his friend Geng Guanjun in USA. Gao was later convicted on the charge of the crime of picking quarrels and provoking trouble, and sentenced to ten-months imprisonment. The Court documents show that China's network management and propaganda departments directly monitor Weixin users, and the Chinese police used big data facial technology to identify Geng Guanjun as an overseas democracy activist.^[134]

In September 2020, Chevron Corporation mandated that its employees delete WeChat from company-issued phones.^[135]

Users inside and outside of China also have expressed concern about the privacy issues of the app. Human rights activist Hu Jia was jailed for three years for sedition. He speculated that the officials of the Internal Security Bureau of the Ministry of Public Security listened to his voicemail messages that were directed to his friends, repeating the words displayed within the voice mail messages to Hu. Chinese authorities have further accused the Weixin app of threatening individual safety. China Central Television (CCTV), a state-run broadcaster, featured a piece in which Weixin was described as an app that helped criminals due to its location-reporting features. CCTV gave an example of such accusations through reporting the murder of a single woman who, after he attempted to rob her, was murdered by a man she met on Weixin. The location-reporting feature, according to reports, was the reason for the man knowing the victim's whereabouts. Authorities within China have linked Weixin to numerous crimes. The city of Hangzhou, for example, reported over twenty crimes related to Weixin in the span of three months.^[115][136]

In 2015, Apple published a list of the top 25 most popular apps infected with the XcodeGhost malware, confirming earlier reports that version 6.2.5 of WeChat for iOS was infected with it.^{[137][138][139]} The malware originated in a counterfeit version of Xcode (dubbed "XcodeGhost"), Apple's software development tools, and made its way into the compiled app through a modified framework.^[140] Despite Apple's review process, WeChat and other infected apps were approved and distributed through the App Store. Even though the cybersecurity company Palo Alto Networks claims that the malware was capable of prompting the user for their account credentials, opening URLs and reading the device's clipboard,^[141] Apple responded that the malware was not capable of doing "anything malicious" or transmitting any personally identifiable information beyond "apps and general system information" and that it had no information that suggested that this had happened.^[137] In 2015 internet security company Malwarebytes considered this to be the largest security breach in the App Store's history.^[140]

In June 2020, the Government of India banned WeChat along with 58 other Chinese apps citing data and privacy issues,^[142] in response to a border clash between India and China earlier in the year.^[118][143] The banned Chinese apps were "stealing and surreptitiously transmitting users’ data in an unauthorized manner to servers which have locations outside India," and was "hostile to national security and defense of India", claimed India's Ministry of Electronics and Information Technology.^[143]

On 6 May 2017, Russia blocked access to WeChat for failing to give its contact details to the Russian communications watchdog.^[144] The ban was swiftly lifted on 11 May 2017 after Tencent provided "relevant information" for registration to Roskomnadzor.^[145]

In March 2023, Russia banned government officials from using messaging apps operated by foreign companies, including WeChat.^[146]

On August 6, 2020, U.S. President Donald Trump signed an executive order, invoking the International Emergency Economic Powers Act, seeking to ban WeChat in the U.S. in 45 days, due to its connections with the Chinese-owned Tencent. This was signed alongside a similar executive order targeting TikTok and its Chinese-owned ByteDance.^[40]

The Department of Commerce issued orders on September 18, 2020, to enact the ban on WeChat and TikTok by the end of September 20, 2020, citing national security and data privacy concerns.^[147][148] The measures ban the transferring of funds or processing through WeChat in the U.S. and ban any company from offering hosting, content delivery networks or internet transit to WeChat.^[149]

Magistrate Judge Laurel Beeler of the United States District Court for the Northern District of California issued a preliminary injunction blocking the Department of Commerce order on both TikTok and WeChat on September 20, 2020, based on respective lawsuits filed by TikTok and US WeChat Users Alliance, citing the merits of the plaintiffs' First Amendment claims.^[41] The Justice Department had previously asked Beeler to not block the order to ban the apps saying it would undermine the presidents ability to deal with threats to national security.^[41] In her ruling, Beeler said that while the government had established that Chinese government activities raised significant national security concerns, it showed little evidence that the WeChat ban would address those concerns.^[41]

On June 9, 2021, U.S. President Joe Biden signed an executive order revoking the ban on WeChat and TikTok. Instead, he directed the commerce secretary to investigate foreign influence enacted through the apps.^[150]

Montana banned the installation of WeChat on government devices since June 1, 2023.^[151]

In October 2023, Canada banned WeChat on all government devices.^[152]

In 2022, the Office of the United States Trade Representative added WeChat's ecommerce ecosystem to its list of Notorious Markets for Counterfeiting and Piracy.^{[153][154][155]}

In the lead-up to the 2023 Australian Indigenous Voice referendum, an unsuccessful attempt to enshrine an Indigenous Voice to Parliament in the Constitution, WeChat and other popular Chinese social media platforms were criticised by both Yes and No supporters and by both Chinese and non-Chinese Australians for its excessive amount of misleading content about the referendum, as well as its excessive amount of posts that allegedly promote anti-Indigenous racism. Researchers from Monash University in Melbourne found that less than one in 10 WeChat posts related to the referendum were supportive of the Yes case, most of which were paid advertisements from the official Yes campaign. The study also found that the vast majority of comments on Voice-related WeChat posts were explicitly supportive of the No case.^[156]

Chinese Australians are a very large minority group in Australia, with many using WeChat as a social media platform. While the usage of Chinese apps such as WeChat in Australia has long been controversial over its potential links to the Chinese government, but it nevertheless is seen as a major social media platform in Australia, directly competing with Western platforms among Chinese speakers in Australia. As voting is compulsory for all Australian citizens over the age of 18, social media advertising is crucial for election campaigns in Australia. Therefore, the significance of the number of No campaign material, some of which even contained misinformation that most No supporters do not agree with, had the potential to sway the votes of Chinese Australians towards the ultimately successful No case.

Starting in 2013, reports arose that Chinese-language searches even outside China were being keyword filtered and then blocked.^[19][20] This occurred on incoming traffic to China from foreign countries but also exclusively between foreign parties (the service had already censored its communications within China). In the international example of blocking, a message was displayed on users' screens: "The message "南方周末" your message contains restricted words. Please check it again." These are the Chinese characters for a Guangzhou-based paper called Southern Weekly (or, alternatively, Southern Weekend). The next day Tencent released a statement addressing the issue saying "A small number of WeChat international users were not able to send certain messages due to a technical glitch this Thursday. Immediate actions have been taken to rectify it. We apologize for any inconvenience it has caused to our users. We will continue to improve the product features and technological support to provide a better user experience." WeChat eventually built two different platforms to avoid this problem; one for the Chinese mainland (Weixin) and one for the rest of the world (WeChat). The problem existed because WeChat's servers were all located in China and thus subjected to its censorship rules.^{[21][22][157]}

Following the overwhelming victory of pro-democracy candidates in the 2019 Hong Kong local elections Weixin censored messages related to the election and disabled the accounts of posters in other countries such as U.S. and Canada.^[158] Many of those targeted were of Chinese ancestry.^[159]

In 2020, Weixin started censoring messages concerning the COVID-19 pandemic.^[160]

In December 2020 Weixin blocked a post by Australian Prime Minister Scott Morrison during a diplomatic spat between Australia and China. In his Weixin post Morrison had criticized a doctored image posted by a Chinese diplomat and praised the Chinese-Australian community. According to Reuters the company claimed to have blocked the post for "violated regulations, including distorting historical events and confusing the public."^[161]

In 2016, the Citizen Lab published a report saying that WeChat was using different censorship policies in mainland China and other areas. They found that:^[162]

1. Keyword filtering was only enabled for users who registered via phone numbers from mainland China;
2. Users did not get notices anymore when messages are blocked;
3. Filtering was more strict on group chat;
4. Keywords were not static. Some newfound censored keywords were in response to current news events;
5. The Internal browser in WeChat blocked Chinese accounts from accessing some websites such as gambling, Falun Gong and critical reports on China. International users were not blocked except for accessing some gambling and pornography websites.

Later, WeChat was split into Weixin (the Chinese version) and WeChat (the international version) as described in the previous section, with only Weixin being subject to censoring. Accounts registered using Chinese phone numbers are now managed under the Weixin brand, and their data is stored in mainland China and subject to Weixin's terms of service and privacy policy, which forbids content which "endanger[s] national security, divulge[s] state secrets, subvert[s] state power and undermine[s] national unity".^[11] Non-Chinese numbers are registered under WeChat, and WeChat users are subject to a different, less strict terms of service and stricter privacy policy, and their data is stored in the Netherlands for users in the European Union, and in Singapore for other users.^[12][13]

In September 2013, WeChat was blocked in Iran. The Iranian authorities cited WeChat Nearby (Friend Radar) and the spread of pornographic content as the reason of censorship.

The Committee for Determining Instances of Criminal Content (a working group under the supervision of the attorney general) website FAQ says:^[163][164]

Because WeChat collects phone data and monitors member activity and because app developers are outside of the country and not cooperating, this software has been blocked, so you can use domestic applications for cheap voice calls, video calls and messaging.

On 4 January 2018, WeChat was unblocked in Iran.^[165]

On July 6, 2021, several Weixin accounts associated with China's university campuses LGBTQ movement were blocked and then deleted without warning; the official media said they had no knowledge of this. Some of the accounts, which consisted of a mix of registered student clubs and unofficial grassroots groups had operated for years as safe spaces for China's LGBTQ youth, with tens of thousands of followers. Many of the closed Weixin accounts display messages saying that they had "violated" Internet regulations, without giving further details, with account names being deleted and replaced with "unnamed", with a notice claiming that all content was blocked and accounts were suspended after receiving relevant complaints. The U.S. State Department expressed concern that the accounts were deleted when they were merely expressing their views, exercising their right to freedom of expression and freedom of speech. Several groups that had their accounts deleted spoke out against the ban with one stating "[W]e hope to use this opportunity to start again with a continued focus on gender and society, and to embrace courage and love".^{[166][167][168][169]}

In August 2023, immediately prior to the Qixi Festival, Weixin launched a mass closure of accounts related to LGBT rights and feminism.^[170]

• Official website