We have only used telegram once and do not fully know its features. We have only recently, about six months back, started using Slack for more than the occasional item. Recently we found a service that uses telegram to send alerts about changes in the Bitcoin price index. What is the benefit of telegram? Those alerts do not pop in the browser if the telegram site is closed. Is the main thing integration with an app on a smartphone? The alerts that telegram uses can be sent to an email, but why wouldn't the site/project using telegram just sent email alerts.