Telegram

Telegram is a cloud-based mobile and desktop messaging app. Users can send messages, photos, videos and files of any type. It supports groups for up to 200,000 people and channels for broadcasting to unlimited audiences. It also supports end-to-end encrypted voice and video calls and group calls for up to 200 participants.

Telegram says it has over 1 billion active users. Its development team is based in Dubai. Telegram for iOS was launched on August 14, 2013, and the alpha version for Android launched on October 20, 2013. Pavel Durov is its founder and CEO, and his brother Nikolai contributes on the technology side. Telegram has apps for iOS, Android, macOS, and a universal desktop app for Windows, macOS, and Linux.

Telegram launched Sponsored Messages in 2021, which can appear in certain public channels. It launched a Premium subscription in 2022.