Check:
www.securemessagingapps.com
Rate the security: π© = 3 π¨ = 1 π₯ = 0
Results:
1. Threema = 85 = the most secure messenger
2. Session = 79
3. Signal = 77
4. Element / Matrix = 59
5. WhatsApp = 34
6. Telegram = 29
7. Apple iMessage = 25
8. Facebook Messenger =25