There are several ways to add people on Telegram, even if they don't have the app. If they're a new user, you can add them to Telegram by sending an invite. Once someone's signed up for Telegram, you ...

Telegram is one of the popular cross-platform instant messaging and VoIP services out there. It is open-source and based on the freeware model. You can use it as an app on Android and iOS, on mobile, ...