Check:

www.securemessagingapps.com

Rate the security: 🟩 = 3 🟨 = 1 🟥 = 0

Results:

1. Threema = 85 = the most secure one

2. Session = 79

3. Signal = 77

4. Element / Matrix = 59

5. WhatsApp = 34

6. Telegram = 29

7. Apple iMessage = 25

8. Facebook Messenger =25