Telegram Desktop messaging app

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README.md

Telegram Desktop – Official Messenger

This is the complete source code and the build instructions for the official Telegram messenger desktop client, based on the Telegram API and the MTProto secure protocol.

The source code is published under GPLv3 with OpenSSL exception, the license is available here.

Supported systems

The latest version is available for

Old system versions

Version 2.4.4 was the last that supports older systems

Version 1.8.15 was the last that supports older systems

Third-party

Qt 6 (LGPL) and Qt 5.15 (LGPL) slightly patched
OpenSSL 1.1.1 and 1.0.1 (OpenSSL License)
WebRTC (New BSD License)
zlib 1.2.11 (zlib License)
LZMA SDK 9.20 (public domain)
liblzma (public domain)
Google Breakpad (License)
Google Crashpad (Apache License 2.0)
GYP (BSD License)
Ninja (Apache License 2.0)
OpenAL Soft (LGPL)
Opus codec (BSD License)
FFmpeg (LGPL)
Guideline Support Library (MIT License)
Range-v3 (Boost License)
Open Sans font (Apache License 2.0)
Vazir font (SIL Open Font License 1.1)
Emoji alpha codes (MIT License)
Catch test framework (Boost License)
xxHash (BSD License)
QR Code generator (MIT License)
CMake (New BSD License)
Hunspell (LGPL)

Build instructions