Why Slack and not, for example, Telegram for teams and businesses?

Question

Project management

Telegram has apps, multi-user chats, private chats.
For free. No need to build a zoo of applications, etc.
What are the benefits of Slack?

Answer 1

Plus in integration with collective development systems (jira, github, redmine, etc.). Have you ever tried to communicate on four projects in one chat at once?
Switched from slack to zulip. I liked the structure of the dialogues more.

Answer 2

Integrations, as already mentioned. They greatly increase the value of the slack.
But in terms of the usual interface, telegrams are still better, always at hand, the excess can be hushed up temporarily.