Whats’ app, while E2EE can still pull lots of information from who you message, how often, the size of the messages, and contact’s phone number. Messenger has the content of your messages and with whom you converse according to Facebook account info stored on Facebook servers. Snapchat has a record of all activity, contacts, and message content. The messages only disappear from app but not from SnapChat servers. All 3 of those record of how you live your life, except Whatsapp can’t see content of messages but still has your activities and contact phone numbers.
Signal was ordered to turn over user content to court and Signal only had when the user last connected to the service and date of account creation. Signal had zero information about messages, when messages were sent, or to whom.
I don’t use Matrix due to a permanent copy of all activity being kept on servers. It seems Matrix only has private group chats but not end-to-end direct messaging to add a contact and message them, you have to invite a user to a chat.
Whats’ app, while E2EE can still pull lots of information from who you message, how often, the size of the messages, and contact’s phone number. Messenger has the content of your messages and with whom you converse according to Facebook account info stored on Facebook servers. Snapchat has a record of all activity, contacts, and message content. The messages only disappear from app but not from SnapChat servers. All 3 of those record of how you live your life, except Whatsapp can’t see content of messages but still has your activities and contact phone numbers.
Signal was ordered to turn over user content to court and Signal only had when the user last connected to the service and date of account creation. Signal had zero information about messages, when messages were sent, or to whom.