In 2013, an author on the Russian programming website Habr discovered a weakness in the first version of MTProto that would allow an attacker to mount a man-in-the-middle attack and prevent the victim from being alerted by a changed key fingerprint. The bug was fixed on the day of the publication with a $100,000 payout to the author and a statement on Telegram's official blog.
Telegram was founded in 2013 by Nikolai and Pavel Durov. Its servers are distributed worldwide, while the headquarters are in Dubai, United Arab Emirates. Telegram is the most popular instant messaging application in parts of Europe, Asia, and Africa.
Telegram was launched in 2013 by the brothers Nikolai and Pavel Durov. Previously, the pair founded the Russian social network VK, which they left in 2014, saying it had been taken over by the government. Pavel sold his remaining stake in VK and left Russia after resisting government pressure. Nikolai created the MTProto protocol that is the basis for the messenger, while Pavel provided financial support and infrastructure through his Digital Fortress fund. Telegram Messenger states that its end goal is not to bring profit, but it is not structured as a non-profit organization.
Telegram Messenger, commonly known as Telegram, is a cloud-based, cross-platform, encrypted instant messaging (IM) service. It was originally launched for iOS on 14 August 2013 and Android in October 2013. It allows users to exchange messages, share media and files, and hold private and group voice or video calls as well as public livestreams. It is available for Android, iOS, Windows, macOS, Linux, and web browsers. Telegram also offers end-to-end encryption in voice and video calls, and in optional private chats, which Telegram calls Secret Chats.
In October 2013, Telegram announced that it had 100,000 daily active users.
Telegram is registered as a company in the British Virgin Islands and as an LLC in Dubai. It does not disclose where it rents offices or which legal entities it uses to rent them, citing the need to "shelter the team from unnecessary influence" and protect users from governmental data requests. After Pavel left Russia in 2014, he was said to be moving from country to country with a small group of computer programmers consisting of 15 core members. While a former employee of VK claimed that Telegram had employees in Saint Petersburg, Pavel said the Telegram team made Berlin, Germany, its headquarters in 2014, but failed to obtain German residence permits for everyone on the team and moved to other jurisdictions in early 2015. Since 2017, the company has been based in Dubai. It has a complex corporate structure of shell companies to delay complying with government subpoenas.
On 26 February 2014, the German consumer organization Stiftung Warentest evaluated several data-protection aspects of Telegram, along with other popular instant-messaging clients. Among the aspects considered were: the security of the data transmission, the service's terms of use, the accessibility of the source code, and the distribution of the app. Telegram was rated 'problematic' (kritisch) overall. The organization was favorable to Telegram's secure chats and partially free code but criticized the mandatory transfer of contact data to Telegram's servers and the lack of an imprint or address on the service's website. It noted that while the message data is encrypted on the device, it could not analyse the transmission due to a lack of source code.
In March 2014, Telegram promised that "all code will be released eventually", including all the various client applications (Android, iOS, desktop, etc.) and the server-side code. As of May 2021, Telegram had not published their server-side source code. In January 2021, Durov explained his rationale for not releasing server-side code, citing reasons such as inability for end-users to verify that the released code is the same code run on servers, and a government that wanted to acquire the server code and make a messaging app that would end competitors.
On 24 March 2014, Telegram announced that it had reached 35 million monthly users and 15 million daily active users. In October 2014, South Korean government surveillance plans drove many of its citizens to switch to Telegram from the Korean app KakaoTalk. In December 2014, Telegram announced that it had 50 million active users, generating 1 billion daily messages, and that it had 1 million new users signing up on its service every week, traffic doubled in five months with 2 billion daily messages. In September 2015, Telegram announced that the app had 60 million active users and delivered 12 billion daily messages.
Telegram has public APIs with which developers can access the same functionality as Telegram's official apps to build their own messaging applications. In February 2015, creators of the unofficial WhatsApp+ client released the Telegram Plus app, later renamed to Plus Messenger, after their original project got a cease-and-desist order from WhatsApp. In September 2015, Samsung released a messaging application based on these APIs.
The Electronic Frontier Foundation (EFF) listed Telegram on its "Secure Messaging Scorecard" in February 2015. Telegram's default chat function received a score of 4 out of 7 points on the scorecard. It received points for having communications encrypted in transit, having its code open to independent review, having the security design properly documented, and having completed a recent independent security audit. Telegram's default chat function missed points because the communications were not encrypted with keys the provider did not have access to, users could not verify contacts' identities, and past messages were not secure if the encryption keys were stolen. Telegram's optional secret chat function, which provides end-to-end encryption, received a score of 7 out of 7 points on the scorecard. The EFF said that the results "should not be read as endorsements of individual tools or guarantees of their security", and that they were merely indications that the projects were "on the right track".
In June 2015, Telegram launched a platform for third-party developers to create bots. Bots are Telegram accounts operated by programs. They can respond to messages or mentions directly or can be invited into groups, and are able to perform tasks, integrate with other programs and host mini apps. Bots can also accept online payments made with credit cards or Apple Pay. The Dutch website Tweakers reported that an invited bot can potentially read all group messages when the bot controller changes the access settings silently at a later point in time. Telegram pointed out that it considered implementing a feature that would announce such a status change within the relevant group. There are also inline bots, which can be used from any chat screen. To activate an inline bot, a user must type the bot's username and a query in the message field. The bot then will offer its content. The user can choose from that content and send it within a chat. Certain approved bots are also able to integrate into the attachment menu, making them accessible in any chat.
In September 2015, in response to a question about the use of Telegram by Islamic State of Iraq and the Levant (ISIS), Pavel Durov stated: "I think that privacy, ultimately, and our right for privacy is more important than our fear of bad things happening, like terrorism." Durov sarcastically suggested to ban words because terrorists use them for communication. ISIS recommended Telegram to its supporters and members and in October 2015 they were able to double the number of followers of their official channel to 9,000. In November 2015, Telegram announced that it had blocked 78 public channels operated by ISIS for spreading its propaganda and mass communication. Telegram stated that it would block public channels and bots that are related to terrorism, but it would not honor "politically-motivated censorship" based on "local restrictions on freedom of speech" and that it allowed "peaceful expression of alternative opinions." ISIS's usage of Telegram reignited the encryption debate and encrypted messaging applications faced new scrutiny.
In December 2015, two researchers from Aarhus University published a report in which they demonstrated that MTProto 1.0 did not achieve indistinguishability under chosen-ciphertext attack (IND-CCA) or authenticated encryption. The researchers stressed that the attack was of a theoretical nature and they "did not see any way of turning the attack into a full plaintext-recovery attack". Nevertheless, they said they saw "no reason why [Telegram] should use a less secure encryption scheme when more secure (and at least as efficient) solutions exist". The Telegram team responded that the flaw does not affect message security and that "a future patch would address the concern". Telegram 4.6, released in December 2017, supports MTProto 2.0, which now satisfied the conditions for IND-CCA. MTProto 2.0 is seen by qualified cryptographers as a vast improvement to Telegram's security.
In June 2017, Pavel Durov in an interview claimed that U.S. intelligence agencies tried to bribe the company's developers to weaken Telegram's encryption or install a backdoor during their visit to the U.S. in 2016.
On 2 August 2016, Reuters reported that Iranian hackers compromised more than a dozen Telegram accounts and identified the phone numbers of 15 million Iranian users, as well as the associated user IDs. Researchers said the hackers belonged to a group known as Rocket Kitten. Rocket Kitten's attacks were similar to ones attributed to Iran's Islamic Revolutionary Guards Corps. The attackers took advantage of a programming interface built into Telegram. According to Telegram, these mass checks are no longer possible because of limitations introduced into its API earlier in 2016.
In February 2016, Telegram announced that it had 100 million monthly active users, with 350,000 new users signing up every day, delivering 15 billion messages daily. In December 2017, Telegram reached 180 million monthly active users. By March 2018, that number had doubled, with Telegram reaching 200 million monthly active users.
In April 2016, the accounts of several Russian opposition members were hijacked by intercepting the SMS messages used for login authorization. In response, Telegram recommended using the optional two-factor authentication feature. In May 2016, the Committee to Protect Journalists and Nate Cardozo, senior staff attorney at Electronic Frontier Foundation, recommended against using Telegram because of "its lack of end-to-end encryption [by default] and its use of non-standard MTProto encryption protocol, which has been publicly criticized by cryptography researchers, including Matthew Green".
In May 2016, critics disputed claims by Telegram that it is "more secure than mass market messengers like WhatsApp and Line", as WhatsApp claims to apply end-to-end encryption to all of its traffic by default and uses the Signal Protocol, which has been "reviewed and endorsed by leading security experts", while Telegram does neither and stores all messages, media and contacts in their cloud. Since July 2016, Line has also applied end-to-end encryption to all of its messages by default, though it has also been criticized for being susceptible to replay attacks and the lack of forward secrecy between clients.
In August 2016, French anti-terrorism investigators asserted that the two ISIS-directed terrorists who murdered a priest in Saint-Étienne-du-Rouvray in Normandy, France, and videoed the murder, had communicated via Telegram and "used the app to coordinate their plans for the attack". ISIS's media wing subsequently posted a video on Telegram, showing the pair pledging allegiance. A CNN news report stated that Telegram had "become known as a preferred means of communication for the terror group ISIS and was used by the ISIS cell that plotted the Paris terror attacks in November" after the attacks. Daily Mirror called Telegram a "jihadi messaging app".
In 2017, in an attempt to monetize Telegram without advertising, the company began the development of a blockchain platform dubbed either "The Open Network" or "Telegram Open Network" (TON) and its native cryptocurrency "Gram". The project was announced in mid-December 2017 and its 132-page technical paper became available in January 2018. The codebase behind TON was developed by Pavel Durov's brother Nikolai Durov, the core developer of Telegram's MTProto protocol. In January 2018 a 23-page white paper and a detailed 132-page technical paper for TON blockchain became available.
In June 2017, the Russian communications regulator Roskomnadzor hinted at the possibility of a blocking of Telegram in Russia due to its usage by terrorists.
In July 2017, Director General of Application and Informatics of the Indonesian Ministry of Communication and Informatics, Semuel Abrijani Pangerapan, said eleven Telegram DNS servers were blocked because many channels in the service "promoted radicalism, terrorism, hatred, bomb assembly, civil attack, disturbing images, and other propaganda contrary to Indonesian laws and regulations." In August 2017, Indonesia lifted the block after countermeasures against negative content were deployed in association with Telegram LLP.
MTProto 1.0 was deprecated in favor of MTProto 2.0 in December 2017, which was deployed in Telegram clients as of v4.6.
In 2018, Telegram sent a message to all Iranian users stating that the Telegram Talai and Hotgram unofficial clients are not secure.
On 15 March 2021, Telegram conducted a five-year public bonds placement worth $1 billion. The funding was required to cover the debts amounting to $625.7 million, including $433 million to investors who bought futures for Gram tokens in 2018 and included purchasers such as David Yakobashvili. On 23 March, Telegram also sold additional bonds worth $150 million to the Abu Dhabi Mubadala Investment Company and Abu Dhabi Catalyst Partners. A day later, the Mubadala Investment Company stated that Russia's sovereign wealth fund participated in its deal undisclosed through the Russia-UAE joint investment platform to buy convertible bonds. A Telegram spokesperson stated: "RDIF is not in the list of investors we sold bonds to. We wouldn't be open to any transaction with this fund" and "[t]he funds that did invest, including Mubadala, confirmed to us that RDIF was not among their LPs [limited partners]." According to the contract, the holders of the bonds will be provided with an option to convert them to shares at a 10% discount if the company conducts an open IPO. Durov stated that the move aimed to "enable Telegram to continue growing globally while sticking to its values and remaining independent". According to press reports, prior to the bonds placement, Durov had rejected an investment offer for a 5–10% stake in the company as well as several undisclosed ones, valuing the company in a $30–40 billion range. In March 2024, Telegram sold an additional $330 million in bonds. Durov said the bond sale "will further solidify our position as an independent platform that is able to challenge the 'Goliaths' of our industry".
Telegram has also been used by the alt-right organization Proud Boys to coordinate throughout the United States. In the United Kingdom, Telegram is one of the main platforms for far-right publication TR.news, maintained by Tommy Robinson, and Britain First, whose pages were blocked by major social media platforms. Weblinks related to these channels received more views on Telegram in 2018 and 2019 than some well-known mainstream news outlets, including The Guardian or the Daily Mail. However, with a relatively small user base and no algorithmic timeline, such groups struggle to build a larger audience on Telegram.
The Anti-Defamation League has called Telegram a white supremacist "safe haven" and a valuable tool for right-wing extremists. Miro Dittrich, a senior researcher for the Center for Monitoring, Analysis and Strategy (CeMAS), a German extremism monitoring agency, said: "Telegram has been critical for the far-right scene in Germany ever since the Identitarian movement migrated there in 2018, having been censored on Facebook and Instagram."
The company was initially supported by founding CEO Pavel Durov's personal funds after the sale of his stake in VK. In January 2018, it launched a private placement and collected $1.7 billion from investors such as Kleiner Perkins, Sequoia Capital, and Benchmark. After the shutdown of the TON project, the company needed to repay the investors the money that was not spent on its development during 2018 and the beginning of 2019, while the project was active.
Durov planned to power TON with the existing Telegram user base, and turn it into the largest blockchain and a platform for apps and services akin to a decentralized WeChat, Google Play, and App Store. Besides, the TON had the potential to become a decentralized alternative to Visa and MasterCard due to its ability to scale and support millions of transactions per second. In January and February 2018 the company ran a private sale of futures contracts for Grams, raising around $1.7 billion. No public offering took place.
In February 2018, Telegram launched their social login feature to its users, named Telegram Login. It features a website widget that could be embedded into websites, allowing users to sign into a third party website with their Telegram account. The gateway sends users' Telegram name, username, and profile picture to the website owner, while users' phone number remains hidden. The gateway is integrated with a bot, which is linked with the developer's specific website domain.
In July 2018, Telegram introduced their online authorization and identity-management system, Telegram Passport, for platforms that require real-life identification. It asks users to upload their own official documents such as passport, identity card, driver license, etc. When an online service requires such identification documents and verification, it forwards the information to the platform with the user's permission. Telegram stated that it does not have access to the data, while the platform will share the information only with the authorized recipient. However, the service was criticised for being vulnerable to online brute-force attacks.
In January 2021, Telegram said that it blocked "hundreds" of neo-Nazi and white supremacist channels with tens of thousands of followers for inciting violence. A 2021 Institute for Strategic Dialogue report on the far-right in Ireland found that messages from Irish far-right groups on the app increased from a total of 801 in 2019 to over 60,000 in 2020.
The development of TON took place in a completely isolated manner, and the release was postponed several times. The test network was launched in January 2019. The launch of the TON main network was scheduled for 31 October. On October 30, the U.S. Securities and Exchange Commission obtained a temporary restrictive order to prevent the distribution of Grams to initial purchasers; the regulator considered the legal scheme employed by Telegram as an unregistered securities offering with initial buyers acting as underwriters.
On 14 March 2019, Pavel claimed that "3 million new users signed up for Telegram within the last 24 hours." He did not specify what prompted this flood of new sign-ups, but the period matched a prolonged technical outage experienced by Facebook and its family of apps, including Instagram. According to the US Securities and Exchange Commission, as of October 2019, Telegram had 300 million monthly active users worldwide.
On 12 June 2019, Telegram confirmed that it suffered a denial-of-service attack which disrupted normal app functionality for approximately one hour. Pavel Durov tweeted that the IP addresses used in the attack mostly came from China.
On 9 June 2019, The Intercept released leaked Telegram messages exchanged between current Brazilian Minister of Justice and former judge Sérgio Moro and federal prosecutors. The hypothesis is that either mobile devices were hacked by SIM swap or the targets' computers were compromised. The Telegram team tweeted that it was either because the user had malware or they were not using two-step verification.
The neo-Nazi white separatist paramilitary hate group The Base switched to Telegram after being blocked on most social media platforms, including Twitter, YouTube and Gab. After a number of arrests of The Base members in January 2020, a note appeared on its official Telegram account warning people to stop posting. In August 2019, white supremacist Christopher Cantwell posted anti-Semitic comments on Telegram.
In November 2019, Telegram participated in Europol's Internet Referral Action Day. As a result, Telegram expanded and strengthened its terrorist content detection and removal efforts. Over 43,000 terrorist-related bots and channels were removed from Telegram. According to U.S. officials, the crackdown on Telegram was especially effective and seemed to be having lasting impact. According to Europol, Telegram put considerable effort into removing abusers of its platform.
In December 2019, Bloomberg News moved their messenger-based newsletter service from WhatsApp to Telegram after the former banned bulk and automated messaging. Other news services with official channels on the platform include the Financial Times, Business Insider and The New York Times.
In December 2019, multiple Russian businessmen suffered account takeovers that involved bypassing SMS single-factor authentication. Security company Group-IB suggested SS7 mobile signalling protocol weaknesses, illegal usage of surveillance equipment, or telecom insider attacks.
A Telegram bot was blocked by Apple in 2020 after posting deepfake pornography.
Telegram has been blocked temporarily or permanently by some governments including Iran, China, Brazil, and Pakistan. The Russian government blocked Telegram for several years before lifting the ban in 2020. The company's founder has said he wants the app to have an anti-censorship tool for Iran and China similar to the app's role in fighting censorship in Russia.
Telegram reportedly banned more than 350,000 bots and channels in 2020, including those that contained child abuse and terrorism-related content.
On 30 March 2020, an Elasticsearch database holding 42 million records containing user IDs and phone numbers of Iranian users was exposed online without a password. The accounts were extracted from not Telegram but an unofficial version of Telegram, in what appears to be a possibly government-sanctioned fork. It took 11 days for the database to be taken down, but the researchers say the data was accessed by other parties, including a hacker who reported the information to a specialized forum.
On 24 April 2020, Telegram announced that it had reached 400 million monthly active users.
The chairman of the public organization "Electronic Democracy" Volodymyr Flents on 11 May 2020 announced that a Telegram bot appeared on the Web, which sold the personal data of Ukrainian citizens. It is estimated that the bot contains data from 26 million Ukrainians registered in the Diia application. However, subsequently, deputy prime minister and minister of digital transformation Mykhailo Fedorov denied any data from the app being leaked. The criminal activity of 25 people has already been confirmed and copies of 30 databases were seized.
Since 2017, Telegram users have been able to initiate one-on-one calls in private chats. Calls are end-to-end encrypted and prioritize peer-to-peer connections. Video calls were introduced in August 2020. According to Telegram, there is a neural network working to learn various technical parameters about a call to provide better quality of service for future uses.
In September 2020, it was reported that Iran's RampantKitten ran a phishing and surveillance campaign against dissidents on Telegram. The attack relied on people downloading a malware-infected file from any source, at which point it would replace Telegram files on the device and 'clone' session data. David Wolpoff, a former Department of Defense contractor, has stated that the weak link in the attack was the device itself and not any of the affected apps: "There's no way for a secure communication app to keep a user safe when the end devices are compromised."
In December 2020, Telegram launched a Bugs and Suggestions platform, where users can submit bug reports and suggestion cards for new features. Others can then vote and comment on the cards.
Telegram added group voice chats in December 2020 and group video chats in June 2021. Group voice and video chats support picture-in-picture video, as well as sharing one's screen, creating a recording of the call, noise suppression and selective muting. In channels, users can start a livestream, able to integrate with third-party apps such as OBS Studio and XSplit.
Telegram's security model has received notable criticism by cryptography experts. They criticized how, unless modified first, the default general security model stores all contacts, messages and media together with their decryption keys on its servers continuously; and that it does not enable end-to-end encryption for messages by default. Pavel Durov has argued that this is because it helps to avoid third-party unsecured backups, and to allow users to access messages and files from any device. Criticisms were also aimed at Telegram's use of a custom-designed encryption protocol. However, in December 2020, a study titled "Automated Symbolic Verification of Telegram's MTProto 2.0" was published, confirming the security of the updated MTProto 2.0 and reviewing it while pointing out several theoretical vulnerabilities. The paper provides "fully automated proof of the soundness of MTProto 2.0's authentication, normal chat, end-to-end encrypted chat, and re-keying mechanisms with respect to several security properties, including authentication, integrity, confidentiality and perfect forward secrecy" and "proves the formal correctness of MTProto 2.0". This partially addresses the concern about the lack of scrutiny while confirming the formal security of the protocol's latest version.
Version 2.0 was proven formally correct in December 2020 by a team from the University of Udine, Italy. The team reviewed the protocol after realizing that they could only find in-depth verifications done of version 1.0, where most criticisms were levied. They used ProVerif, a verifier based on the symbolic Dolev-Yao model. In the published paper, they "provide a fully automated proof of the soundness of MTProto 2.0’s protocols for authentication, normal chat, end-to-end encrypted chat, and re-keying mechanisms with respect to several security properties, including authentication, integrity, confidentiality and perfect forward secrecy...MTProto 2.0 is assumed to be a perfect authenticated encryption scheme (IND-CCA and INT-CTXT)." However, the team also stated that because all communication, including plaintext and ciphertext, passes through Telegram servers, and because the server is responsible for choosing Diffie–Hellman parameters, the "server should not be considered as trusted." They also concluded that a man-in-the-middle attack is possible if users fail to check the fingerprints of their shared keys. Finally, they qualified their conclusion with the caveat that "properties need to be formally proved in order to deem MTProto 2.0 definitely secure. This proof cannot be done in a symbolic model like ProVerif’s, but it can be achieved in a computational model, using tools like CryptoVerif or EasyCrypt."
In 2021, a bot was found selling leaked phone numbers from Facebook.
In 2021, the Telegram team announced a direct build of its Android app. Telegram for Android is available directly from the Telegram website. It is automatically updated and will most likely get new versions faster than the apps in the Play Store and App Store. A distinctive feature of this version is the ability to view channels/groups on a specific topic without censorship, which cannot be viewed from an app distributed from Google Play or the Apple Store due to their policies.
As of March 2024, Telegram has more than 900 million monthly active users, with India leading in the number of users. It was the most downloaded app worldwide in January 2021 with 1 billion downloads globally as of late August 2021.
In January 2021, North Macedonian media outlets reported that a now-banned Telegram group, with more than 7,000 members, titled "Public Room" ("Јавна соба") was used to share nude photos of women, often young teenage girls. Along with the shared photographs, anonymous accounts shared private information of the women, including phone numbers and social media profiles, encouraging members of the group to contact the women and ask for sexual favours. This was done without prior agreement or knowledge of the women, causing intense public backlash and demand for the group to be shut down. The President of North Macedonia Stevo Pendarovski, along with the Prime Minister of North Macedonia Zoran Zaev, demanded an immediate reaction from Telegram and threatened to completely restrict access to the app in the country if no actions were taken. The group was banned after reports from users and media, although no public statement was made.
On 8 January 2021, Pavel announced in a blog post that Telegram had reached "about 500 million" monthly active users. In August, TechCrunch reported that India was Telegram's largest market, with a 22% share of total installs coming from the region. Telegram then gained over 70 million new users as a result of an outage which affected Facebook and its affiliates on 5 October 2021.
The judge hearing the Telegram v. SEC case, P. Kevin Castel, ultimately agreed with the SEC's argument and kept the restrictions on Gram distribution in force. The ban applied to non-U.S.-based purchasers as well, because Telegram could not prevent the re-sale of Grams to U.S. citizens on a secondary market, as the anonymity of users was one of the key features of TON. Following that, Durov announced the end of Telegram's active involvement with TON. On 26 June, the judge approved the settlement between Telegram and SEC. The company agreed to pay an $18.5 million penalty and return $1.22 billion to Gram purchasers. In March 2021, Telegram launched a bonds offering to cover the debt and fund further growth of the app.
In April 2021, the Payments 2.0 upgrade enabled bot payments within any chat, using third-party services such as Sberbank, Tranzoo, Payme, CLICK, LiqPay and ECOMMPAY to process the credit card information.
In June 2021, an update introduced a new bot menu where users can browse and send commands while in a chat with a bot.
In July 2021, researchers from Royal Holloway, University of London and ETH Zurich published an analysis of the MTProto protocol, concluding that the protocol could provide a "confidential and integrity-protected channel" for communication. They also found that attackers had the theoretical ability to reorder messages coming from the client to the server though the attacker would not be able to see the content of the messages. Several other theoretical vulnerabilities were reported as well, in response to which Telegram released a document stating that the MITM attack on the key exchange was impossible as well as detailing the changes made to the protocol to protect from it in the future. All issues were patched before the paper's publication with a security bounty paid out to the researchers.
On 27 August 2021, the U.S. House of Representatives select committee investigating the 2021 United States Capitol attack demanded records from Telegram (alongside 14 other social media companies) going back to the spring of 2020.
In September 2021, a Russian researcher published details about a bug with the self-destruct feature that allowed the user to recover deleted photos from their own device. The bug was patched prior to publication and Telegram representatives offered a €1,000 bug bounty. The researcher did not sign the NDA that came with the offer and did not receive the award, opting to disclose the bug.
In September 2021, prior to the regional elections in Russia, Telegram suspended several bots spreading information about the election, including a bot run by the opposition party and critics of incumbent president Vladimir Putin's government, citing election silence as the reason, though a blog post by the company's CEO implied the company was following Apple and Google, which "dictate the rules of the game to developers". The blocking of the main Smart Voting bot was criticized by allies of Alexei Navalny, a Kremlin critic and former opposition leader. Navalny's spokeswoman Kira Yarmysh called the block and the deletion of the tactical voting app from app stores "censorship [...] imposed by private companies". In a later blog post, Durov directly stated that the block was a result of pressure from Google and Apple as refusal to comply with their policies would result "in an immediate shutdown of Telegram for millions of users". The post included a screenshot showing an internal email sent by the App Store to developers, demanding the takedown of content related to Navalny.
Telegram has stated that the company will never serve advertisements in private chats. In late 2020, Durov announced that the company was working on its own ad platform, and would integrate non-targeted ads in public one-to-many channels, that already were selling and displaying ads in the form of regular messages. Ads from Telegram's "Sponsored Messages" platform began to appear in channels with more than 1000 followers in October 2021.
In 2022, Telegram canceled a bot monetization upgrade program, because Apple demanded a cut.
In January 2022, the British anti-disinformation organization Logically reported that Holocaust denial, neo-Nazism and other forms of hate speech were flourishing on the Discord and Telegram groups of the German website Disclose.tv.
Telegram has more than 20,000 stickers. Stickers are cloud-based, high-resolution images intended to provide more expressive emoji. When typing in an emoji, the user is offered to send the respective sticker instead. Stickers come in collections called "packs", and multiple stickers can be offered for one emoji. Telegram comes with one default sticker pack, but users can install additional sticker packs provided by third-party contributors. Sticker sets installed from one client become automatically available to all other clients. Sticker images use WebP file format, which is better optimized to be transmitted over the internet. The Telegram clients also support animated emoji. In January 2022, video stickers were added, which use the WebM file format and do not feature any software requirements to create. In September 2022, Telegram has given free users access to dozens of reactions, even some that were only previously available to Premium subscribers. In order to accommodate the new reactions, the reaction panel has been expanded and redesigned.
In March 2022, Telegram's usage share in Russia had jumped to 63%, overtaking WhatsApp's usage share of 32% to become the most popular messaging app in the country. On 19 June 2022, Telegram announced that it had reached 700 million monthly active users.
In April 2022, bots gained support for customized interfaces and inline page loading. Interfaces can be adjusted to match the app's theme even if it changes while interacting with the bot.
Telegram Premium was launched on 19 June 2022 with regional pricing. The optional paid subscription gives users increased limits in the app, such as larger file uploads, faster download speeds, unlimited voice message transcription, as well as numerous other increases such as the number of pinned chats and folders. Premium users also have access to extra stickers, emoji, reactions, and customization features like a special badge and the ability to change the look of their messages in chats. Premium users also get access to additional settings, like instant chat translation, and the ability to restrict who can send them voice messages.
In March 2023, the Norwegian National Security Authority (NSM) advised against the use of Telegram and TikTok on business devices (especially the ones used for government related activities), the assessment has been commissioned and supported by the Ministry of Justice and Public Security, Emilie Enger Mehl. Regarding Telegram, the report cites its lack of end-to-end encryption by default, its Russian origins and third-party open source intelligence as major critical points.
In March 2023, the Office of the United Nations High Commissioner for Human Rights called on Telegram to allocate resources "to identify, prevent, and mitigate human rights abuses on its platform." As of March 2023 , Telegram had blocked at least 13 pro-military accounts.
On 26 April 2023, Telegram was temporarily suspended throughout Brazil, and the company was fined R$1 million (2023) (US$.mw-parser-output .tooltip-dotted{border-bottom:1px dotted;cursor:help}185,528.76) daily for not complying with a Federal Police investigation into neo-Nazi activities on the platform. The company only partially fulfilled a court request for personal data on two anti-Semitic Telegram groups, which authorities considered an intentional lack of cooperation. The decision was made after a series of violent school attacks, with at least one incident being linked to exchanges on an anti-Semitic group. The Telegram CEO then said that the requested data was technologically impossible to obtain. A federal court lifted the suspension three days later, but upheld the daily fine. Twelve days later, Telegram told its users that the Brazilian Congressional Bill No. 2630 against online disinformation, which was about to be approved, would end freedom of speech in the country.
In July 2023, Hyderabad Police uncovered a fraud wherein 15,000 Indian citizens were duped out of ₹712 crore (US$89 million) in less than a year, all related to "prepaid tasks" on Telegram; a cybercrime police investigation of the money trail revealed that the fraud originated from China and the money was laundered by mules through cryptocurrency wallets.
In July 2023, Telegram has more than 800 million monthly active users.
Since July 2023, Telegram had been the most popular social media in Russia, with a market share of 46.8% as of December 2023.
In September 2023, the Singapore Police stated that more than 6,600 Singaporeans had lost over S$96.8 million (US$72.24 million) to prepaid job scams on Telegram and WhatsApp since the start of the year.
As of March 2024, Telegram has more than 900 million monthly active users according to Pavel.
In March 2024, a judge of Spain's Audiencia Nacional ordered the temporary blocking of Telegram in the country. The order came following a complaint from media organizations —Mediaset, Atresmedia y Movistar Plus+— saying that the app allowed users to share copyrighted content without their consent. A few days later and, after several criticism, the same judge suspended his order until the police issue a report on the consequences that this measure would have for users. Finally, the judge annulled the order, considering it "disproportionate."
In late 2020, Durov announced that Telegram will consider adding paid features aimed at enterprise clients. According to him, these features will require more bandwidth and the added cost will be covered by the feature prices, in addition to covering some of the costs incurred by regular users.
By default, logging into Telegram requires either an SMS message sent to the registered number or a code message sent to one of the active sessions on another device. Users have the option to set a two-step verification password and add a recovery email. In late 2022, options to Sign in with Apple and Sign In with Google or with an email address were added. Whenever a new device successfully logs in to a user's account, a special service notification is sent and a login alert is displayed in the chat list of their other devices.