New study reveals which messaging app saves you the most data - Neowin
Data collection comparison of Signal, iMessage, WhatsApp & Facebook Messenger. (From Forbes article) : r/signal
Aki Anastasiou on Twitter: "Signal vs Telegram vs WhatsApp vs Facebook Messenger What data is collected from your phone. You decide… @signalapp @telegram @WhatsApp @Facebook https://t.co/V8T6hW8Lg2 #Whatsapp #Telegram #Signal #Facebook #Privacy #Data
WhatsApp vs Telegram vs Signal vs Messenger: Personal Data Collected by Apps
WhatsApp is the World's most used messaging app and it's not even close – Phandroid