Why I told my friends to stop using WhatsApp and Telegram
Romain Aubert
6.2K129

> “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?

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