

It depends. By default, it uses a weaker encryption than WhatsApp. You can turn on e2e encryption, but not in group chats.
On the other hand, it has multiple FOSS clients, will work on pretty much any platform, and has a great UI.
If you want a fairly secure chat app that your grandparents can use, then Telegram is perfect. If you’re sending highly confidential stuff, then no.
It’s also suitable for project groups, because of the better tools (and moderation bots) available to the mods.




Sometimes, in order to protect everyone’s freedom, you have to put some restrictions on freedom. Like ‘you should not stab people’, or ‘don’t drive on the wrong side of the road’. I guess this is similar.
But also check who legally ‘owns’ your work. It could be the government, your university, or whoever funds your work. They might have rules on licencing.