Too Long; Didn't Read
Telegram is a popular messaging app that boasts over 300 million users and over 50 billion messages sent each day. It was founded in 2013 by brothers Nikolai and Pavel Durov. The social network grew at an unprecedented rate (more than 200 million users in two years) and started to incur added traffic and server costs. Telegram officially became "freemium forever" in June. It is not exactly $0.99 but it is less expensive than the premium versions offered by other apps such as Slack or Discord.