Telegram (software)
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Telegram running on Android Lollipop
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| Developer(s) | Telegram Messenger LLP | ||||||||||||
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| Initial release | August 2013 | ||||||||||||
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| Development status | Active | ||||||||||||
| Operating system | Cross-platform | ||||||||||||
| Available in | English, Arabic, Spanish, German, Italian, Korean, Dutch, Portuguese, Aragonese | ||||||||||||
| Type | Instant messaging | ||||||||||||
| License |
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| Website | telegram |
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| Android | 3.17 / February 26, 2017 |
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| iOS | 3.16.1 / January 6, 2017 |
| Windows Phone | 1.29 / November 18, 2016 |
| Web Application | 0.5.5 / April 22, 2016 |
| macOS | 2.30 / January 3, 2017 |
| Desktop | 1.0.14 / February 19, 2017 |
| Android | 3.18 (9445) / March 11, 2017 |
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| iOS (Swift) | 3.5 (66) / March 11, 2017 |
| Desktop | 1.0.21 alpha / March 12, 2017 |
Telegram is a free cloud-based instant messaging service. Telegram clients exist for both mobile (Android, iOS, Windows Phone, Ubuntu Touch) and desktop systems (Windows, macOS, Linux). Users can send messages and exchange photos, videos, stickers, audio, and files of any type. Telegram also provides optional end-to-end-encrypted messaging.
Telegram is supported by Russian entrepreneur Pavel Durov. Its client-side code is open-source software, whereas its server-side code is closed-source and proprietary. The service also provides APIs to independent developers. In February 2016, Telegram stated that it had 100 million monthly active users, sending 15 billion messages per-day.
The security of Telegram has faced notable scrutiny; critics have argued that Telegram's security model is undermined by its use of a custom-designed encryption protocol that has not been proven reliable and secure, and by not enabling secure conversations by default. Telegram has also faced criticism for its wide-scale use by the terrorist organization Islamic State.
Telegram was launched in 2013 by brothers Nikolai and Pavel Durov, who previously founded the Russian social network VK, but had to leave the company after it was taken over by Mail.ru Group. Nikolai Durov created the MTProto protocol that is the basis for the messenger, while Pavel provided financial support and infrastructure through his Digital Fortress fund with business partner Axel Neff, a third founder of Telegram.
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