I do only use the most secure messenger - thats Threema !

On nostr you can send messages - but everybody can see "who is writing who" = metadata!

Threema does not stores metadata - so for me its the best solution!

Check:

www.securemessagingapps.com

Rate the security: 🟩 = 3  🟨 = 1 🟥 = 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 

 But who uses threema? Unfortunately not so much :/ 

 I started with my small personal bubble, family and some friends. 

The total number is not important.