Telegram Desktop

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.

Old system versions

Version 4.9.9 was the last that supports older systems

• macOS 10.12 (opens in a new tab)
• Linux with glibc < 2.28 static build (opens in a new tab)

Version 2.4.4 was the last that supports older systems

• OS X 10.10 and 10.11 (opens in a new tab)
• Linux static build for 32 bit (opens in a new tab)

Version 1.8.15 was the last that supports older systems

• Windows XP and Vista (opens in a new tab) (portable (opens in a new tab))
• OS X 10.8 and 10.9 (opens in a new tab)
• OS X 10.6 and 10.7 (opens in a new tab)

Third-party

• Qt 6 ([LGPL](http://doc.qt.io/qt-6/lgpl.html)) and Qt 5.15 ([LGPL](http://doc.qt.io/qt-5/lgpl.html)) slightly patched
• OpenSSL 3.2.1 (Apache License 2.0 (opens in a new tab))
• WebRTC (New BSD License (opens in a new tab))
• zlib ([zlib License](http://www.zlib.net/zlib_license.html))
• LZMA SDK 9.20 ([public domain](http://www.7-zip.org/sdk.html))
• liblzma ([public domain](http://tukaani.org/xz/))
• Google Breakpad (License (opens in a new tab))
• Google Crashpad (Apache License 2.0 (opens in a new tab))
• GYP (BSD License (opens in a new tab))
• Ninja (Apache License 2.0 (opens in a new tab))
• OpenAL Soft (LGPL (opens in a new tab))
• Opus codec ([BSD License](http://www.opus-codec.org/license/))
• FFmpeg (LGPL (opens in a new tab))
• Guideline Support Library (MIT License (opens in a new tab))
• Range-v3 (Boost License (opens in a new tab))