Get full access to Telegram. Telegram Messenger is a cross-platform messenger whose clients are open source. Telegram users can exchange encrypted and self-destructing messages, photos, videos and documents (all file-types supported). Telegram is officially available for Android and iOS (including tablets and no-wifi devices). Unofficial clients for Windows Phone, as well as a Web version, OS X version, Linux version and a Windows desktop client are available from independent developers using the Telegram API.