Telegram Applications
Telegram apps are open source and support reproducible builds. Anyone can independently verify that Telegram apps you download from App Store or Google Play were built using the exact same code that we publish.
Mobile apps
Desktop apps
Web apps
Telegram Database Library (TDLib)
TDLib – a cross-platform client designed to facilitate creating custom apps on the Telegram platform.
Telegram X for Android – a slick experimental Telegram client based on TDLib.
Unofficial apps
Source code
This code allows security researchers to fully evaluate our end-to-end encryption implementation. It is also possible to independently verify that Telegram apps available on Google Play and App Store are built using the same code that we publish on GitHub.