Check:

https://SecureMessagingApps.com

rate

🟩=3

🟨=1

🟥=0

Result

86 #Threema = 86 Security Points = most secure #Messenger

81 #SimpleX Chat

77 #Signal

77 #Session

68 #Wire

61 #Wickr (Amazon)

56 #Element / Matrix

37 #Apple iMessage

32 #WhatsApp

27 #Telegram

26 #Facebook Messenger

10 #Microsoft Skype