Why I told my friends to stop using WhatsApp and Telegram
Romain Aubert
9.3K146

> “Like WhatsApp and Facebook, Telegram accesses and stores your contact list on its server. This is how they’re are able to send you a notification when someone new from you contact list joins Telegram. Nice of them, right?”

But I also receive a notification when someone I know joins Signal — I imagine it’s done client-side somehow?