Telegram Desktop is a messaging app that offers a range of features, including fast and secure messaging, syncing across all devices, and unlimited file sharing. It is available for Windows, macOS, and Linux, and can be installed from the dl.flathub.org link.
The app is developed in the open by an international community and is released under the GNU General Public License v3.0. It has a fully documented and free API for developers, and verifiable builds to prove the app you download is built from the exact same source code that is published.
Telegram Desktop supports systems including Windows 7 and above (64 bit), macOS 10.13 and above, and Linux static build for 64 bit. It also has a Snap and Flatpak version available.
The app uses a combination of 256-bit symmetric AES encryption, 2048-bit RSA encryption, and Diffie–Hellman secure key exchange for security. It also has a range of third-party libraries, including Qt 6, Qt 5.15, OpenSSL 3.2.1, WebRTC, zlib 1.2.11, LZMA SDK 9.20, and more.
You can download the latest version of Telegram Desktop from the desktop.telegram.org link.